* Wed Jun 17 2026 mcepl@cepl.eu
- Update to 3.13.14:
- Security
- gh-151159: Bumps the OpenSSL version to 3.0.21 on Android.
- gh-150599: Fix a possible stack buffer overflow in bz2 when
a bz2.BZ2Decompressor is reused after a decompression
error. The decompressor now becomes unusable after libbz2
reports an error.
- gh-149835: shutil.move() now resolves symlinks via
os.path.realpath() when checking whether the destination is
inside the source directory, preventing a symlink-based
bypass of that guard.
- gh-149698: Update bundled libexpat to version 2.8.1 for the
fix for CVE 2026-45186.
- gh-87451: The ftplib module’s undocumented ftpcp function
no longer trusts the IPv4 address value returned from the
source server in response to the PASV command by default,
completing the fix for CVE-2021-4189. As with ftplib.FTP,
the former behavior can be re-enabled by setting the
trust_server_pasv_ipv4_address attribute on the source
ftplib.FTP instance to True. Thanks to Qi Deng at Aurascape
AI for the report.
- gh-149486: tarfile.data_filter() now validates link targets
using the same normalised value that is written to disk,
strips trailing separators from the member name when
resolving a symlink’s directory, and rejects link members
that would replace the destination directory itself. This
closes several path-traversal bypasses of the data
extraction filter.
- gh-149079: Fix a potential denial of service in
unicodedata.normalize(). The canonical ordering step of
Unicode normalization used a quadratic-time insertion sort
for reordering combining characters, which could be
exploited with crafted input containing many combining
characters in non-canonical order. Replaced with
a linear-time counting sort for long runs.
- gh-149018: Improved protection against XML hash-flooding
attacks in xml.parsers.expat and xml.etree.ElementTree when
Python is compiled with libExpat 2.8.0 or later.
- gh-149017: Update bundled libexpat to version 2.8.0.
- gh-90309: Base64-encode values when embedding cookies to
JavaScript using the http.cookies.BaseCookie.js_output()
method to avoid injection and escaping. (bsc#1262654,
CVE-2026-6019)
- gh-148808: Added buffer boundary check when using nbytes
parameter with
asyncio.AbstractEventLoop.sock_recvfrom_into(). Only
relevant for Windows and the asyncio.ProactorEventLoop.
- gh-148395: Fix a dangling input pointer in
lzma.LZMADecompressor, bz2.BZ2Decompressor, and internal
zlib._ZlibDecompressor when memory allocation fails with
MemoryError, which could let a subsequent decompress() call
read or write through a stale pointer to the
already-released caller buffer. (bsc#1262098,
CVE-2026-6100, seems like it has been incompletely applied
gh#python/cpython#151605)
- gh-148169: A bypass in webbrowser allowed URLs prefixed
with %action to pass the dash-prefix safety check
(bsc#1262098, CVE-2026-6100).
- gh-146581: Fix vulnerability in shutil.unpack_archive() for
ZIP files on Windows which allowed to write files outside
of the destination tree if the patch in the archive
contains a Windows drive prefix. Now such invalid paths
will be skipped. Files containing “..” in the name (like
“foo..bar”) are no longer skipped.
- gh-146333: Fix quadratic backtracking in
configparser.RawConfigParser option parsing regexes (OPTCRE
and OPTCRE_NV). A crafted configuration line with many
whitespace characters could cause excessive CPU usage.
- gh-146211: Reject CR/LF characters in tunnel request
headers for the HTTPConnection.set_tunnel() method.
(bsc#1261969, CVE-2026-1502)
- Core and Builtins
- gh-151112: Fix a crash in the compiler that could occur
when running out of memory.
- gh-151126: Fix a crash, when there’s no memory left on
a device, which happened in:
- code compilation - _winapi.CreateProcess()
- Now these places raise proper MemoryError errors.
- gh-150633: Fix the frozen importer accepting module names
with embedded null bytes, which caused it to bypass the
sys.modules cache and create duplicate module objects.
- gh-149156: Fix an intermittent crash after os.fork() when
perf trampoline profiling is enabled and the child returns
through trampoline frames inherited from the parent
process.
- gh-149449: Fix a use-after-free crash when the unicodedata
module was removed from sys.modules and garbage-collected
between calls that decode \N{...} escapes or use the
namereplace codec error handler.
- gh-148450: Fix abc.register() so it invalidates type
version tags for registered classes.
- gh-150207: Fix a crash when a memory allocation fails
during tokenizer initialization. A proper MemoryError is
now raised instead.
- gh-150107: asyncio: sendfile() and sock_sendfile() event
loop methods now call file.seek(offset) if file has
a seek() method, even if offset is 0 (default value).
- gh-150146: Fix a crash on a complex type variable
substitution.
- from typing import TypeVar;
memoryview[TypeVar("")][*typing.Mapping[..., ...]] used to
fail due to missing NULL check on _unpack_args C function
call.
- gh-149590: Fix crash when faulthandler is imported more
than once.
- gh-149738: sqlite3: Disallow removing row_factory and
text_factory attributes of a connection to prevent a crash
on a query.
- gh-139808: Add branch protections for AArch64 (BTI/PAC) in
assembly code used by -X perf_jit (Linux perf profiler
integration).
- gh-148820: Fix a race in _PyRawMutex on the free-threaded
build where a Py_PARK_INTR return from _PySemaphore_Wait
could let the waiter destroy its semaphore before the
unlocking thread’s _PySemaphore_Wakeup completed, causing
a fatal ReleaseSemaphore error.
- gh-148653: Forbid marshalling recursive code objects which
cannot be correctly unmarshalled.
- gh-148390: Fix an undefined behavior in memoryview when
using the native boolean format (?) in cast(). Previously,
on some common platforms, calling
memoryview(b).cast("?").tolist() incorrectly returned
[False] instead of [True] for any even byte b. Patch by
Bénédikt Tran.
- gh-148418: Fix a possible reference leak in a corrupted
TYPE_CODE marshal stream.
- gh-148222: Fix vectorcall support in types.GenericAlias
when the underlying type does not support the vectorcall
protocol. Fix possible leaks in types.GenericAlias and
types.UnionType in case of memory error.
- gh-145376: Fix reference leaks in various unusual error
scenarios.
- C API
- gh-150907: Fix dynamic_annotations.h header file when built
with C++ and Valgrind: add extern "C++" scope for the C++
template. Patch by Victor Stinner.
- Build
- gh-149351: Avoid possible broken macOS framework install
names when DESTDIR is specified during builds.
- gh-146475: Block Apple Clang from being used to build the
JIT as it ships without required LLVM tools.
- gh-148535: No longer use the gcc -fprofile-update=atomic
flag on i686. The flag has been added to fix a random GCC
internal error on PGO build (gh-145801) caused by
corruption of profile data (.gcda files). The problem is
that it makes the PGO build way slower (up to 47x slower)
on i686. Since the GCC internal error was not seen on i686
so far, don’t use -fprofile-update=atomic on i686 anymore.
Patch by Victor Stinner.
- Library
- gh-150913: Fix sqlite3.Blob slice assignment to raise
TypeError and IndexError for type and size mismatches
respectively, even when the target slice is empty.
- gh-143008: Fix race conditions when re-initializing
a io.TextIOWrapper object.
- gh-150685: Update bundled pip to 26.1.2
- gh-150406: Fix a possible crash occurring during socket
module initialization when the system is out of memory on
platforms without a reentrant gethostbyname.
- gh-150372: readline: Fix a potential crash during tab
completion caused by an out-of-memory error during module
initialization.
- gh-150175: Fix race condition in
unittest.mock.ThreadingMock where concurrent calls could
lose increments to call_count and other attributes due to
a missing lock in _increment_mock_call.
- gh-84353: Preserve non-UTF-8 encoded filenames when
appending to a zipfile.ZipFile. Previously, non-ASCII names
stored in a legacy encoding (without the UTF-8 flag bit
set) could be corrupted when the central directory was
rewritten: they were decoded as cp437 and then re-stored as
UTF-8.
- gh-149995: Update various docstrings in typing.
- gh-88726: The email package now uses standard MIME charset
names “gb2312” and “big5” instead of non-standard names
“eucgb2312_cn” and “big5_tw”.
- gh-149571: Fix the C implementation of
xml.etree.ElementTree.Element.itertext(): it no longer
emits text for comments and processing instructions.
- gh-149921: Fix reference leaks in error paths of the
_interpchannels and _interpqueues extension modules.
- gh-149801: Add IANA registered names and aliases with
leading zeros before number (like IBM00858, CP00858,
IBM01140, CP01140) for corresponding codecs.
- gh-149701: Fix bad return code from Lib/venv/bin/activate
if hashing is disabled
- gh-112821: In the REPL, autocompletion might run arbitrary
code in the getter of a descriptor. If that getter raised
an exception, autocompletion would fail to present any
options for the entire object. Autocompletion now works as
expected for these objects.
- gh-149388: Make asyncio.windows_utils.PipeHandle closing
idempotent.
- gh-149489: Fix ElementTree serialization to HTML. The
content of elements “xmp”, “iframe”, “noembed”, “noframes”,
and “plaintext” is no longer escaped. The “plaintext”
element no longer have the closing tag.
- gh-149377: Update bundled pip to 26.1.1
- gh-149231: In tomllib, the number of parts in TOML keys is
now limited.
- gh-149117: Fix runpy.run_module() and runpy.run_path() to
set the name attribute on the ImportError they raise.
- gh-149148: ensurepip: Upgrade bundled pip to 26.1. This
version fixes the CVE 2026-3219 vulnerability. Patch by
Victor Stinner.
- gh-148093: Fix an out-of-bounds read of one byte in
binascii.a2b_uu(). Raise binascii.Error, instead of reading
past the buffer end.
- gh-148914: Fix memoization of in-band PickleBuffer in the
Python implementation of pickle. Previously, identical
PickleBuffers did not preserve identity, and empty writable
PickleBuffer memoized an empty bytearray object in place of
b'', so the following references to b'' were unpickled as
an empty bytearray object.
- gh-138907: Support RFC 9309 in urllib.robotparser.
- gh-148954: Fix XML injection vulnerability in
xmlrpc.client.dumps() where the methodname was not being
escaped before interpolation into the XML body.
- gh-148801: xml.etree.ElementTree: Fix a crash in
Element.__deepcopy__ on deeply nested trees.
- gh-148735: xml.etree.ElementTree: Fix a use-after-free in
Element.findtext when the element tree is mutated
concurrently during the search.
- gh-146553: Fix infinite loop in typing.get_type_hints()
when __wrapped__ forms a cycle. Patch by Shamil Abdulaev.
- gh-148508: An intermittent timing error when running SSL
tests on iOS has been resolved.
- gh-148518: If an email containing an address header that
ended in an open double quote was parsed with
a non-compat32 policy, accessing the username attribute of
the mailbox accessed through that header object would
result in an IndexError. It now correctly returns an empty
string as the result.
- gh-148370: configparser: prevent quadratic behavior when
a ParsingError is raised after a parser fails to parse
multiple lines. Patch by Bénédikt Tran.
- gh-148254: Use singular “sec” instead of “secs” in timeit
verbose output for consistency with other time units.
- gh-148192: email.generator.Generator._make_boundary could
fail to detect a duplicate boundary string if linesep was
not n. It now correctly detects boundary strings when
linesep is rn as well.
- gh-146313: Fix a deadlock in multiprocessing’s resource
tracker where the parent process could hang indefinitely in
os.waitpid() during interpreter shutdown if a child created
via os.fork() still held the resource tracker’s pipe open.
- gh-145831: Fix email.quoprimime.decode() leaving a stray \r
when eol='\r\n' by stripping the full eol string instead of
one character.
- gh-145105: Fix crash in csv reader when iterating with
a re-entrant iterator that calls next() on the same reader
from within __next__.
- gh-130750: Restore quoting of choices in argparse error
messages for improved clarity and consistency with
documentation.
- gh-105936: Attempting to mutate non-field attributes of
dataclasses with both frozen and slots being True now
raises FrozenInstanceError instead of TypeError. Their
non-dataclass subclasses can now freely mutate non-field
attributes, and the original non-slotted class can be
garbage collected. The fix also handles the case of an
empty __class__ cell on a function found within the class
(gh-148947).
- gh-142516: ssl: fix reference leaks in ssl.SSLContext
objects. Patch by Bénédikt Tran.
- gh-142831: Fix a crash in the json module where
a use-after-free could occur if the object being encoded is
modified during serialization.
- gh-140287: The asyncio REPL now handles exceptions when
executing PYTHONSTARTUP scripts. Patch by Bartosz Sławecki.
- gh-90949: Add
SetBillionLaughsAttackProtectionActivationThreshold() and
SetBillionLaughsAttackProtectionMaximumAmplification() to
xmlparser objects to tune protections against billion
laughs attacks. Patch by Bénédikt Tran.
- gh-132631: Fix “I/O operation on closed file” when parsing
JSON Lines file with JSON CLI.
- gh-128110: Fix bug in the parsing of email address headers
that could result in extraneous spaces in the decoded text
when using a modern email policy. Space between pairs of
adjacent RFC 2047 encoded-words is now ignored, per section
6.2 (and consistent with existing parsing of unstructured
headers like Subject).
- gh-107398: Fix tarfile stream mode exception when process
the file with the gzip extra field.
- gh-123853: Update the table of Windows language code
identifiers (LCIDs) used by locale.getdefaultlocale() on
Windows to protocol version 16.0 (2024-04-23).
- gh-70039: Fixed bug where smtplib.SMTP.starttls() could
fail if smtplib.SMTP.connect() is called explicitly rather
than implicitly.
- gh-83281: email: improve handling trailing garbage in
address lists to avoid throwing AttributeError in certain
edge cases
- gh-91099: imaplib.IMAP4.login() now raises exceptions with
str instead of bytes. Patch by Florian Best.
- IDLE
- bpo-6699: Warn the user if a file will be overwritten when
saving.
- Documentation
- gh-150319: Generic builtin and standard library types now
document the meaning of their type parameters.
- gh-148663: Document that calendar.IllegalMonthError is
a subclass of both ValueError and IndexError since Python
3.12.
- gh-146646: Document that glob.glob(), glob.iglob(),
pathlib.Path.glob(), and pathlib.Path.rglob() silently
suppress OSError exceptions raised from scanning the
filesystem.
- gh-109503: Fix documentation for shutil.move() on usage of
os.rename() since nonatomic move might be used even if the
files are on the same filesystem. Patch by Fang Li
- Tests
- gh-151130: Add more tests for PyWeakref_* C API.
- gh-149776: Fix test_socket on Linux kernel 7.1 and newer:
skip UDP Lite tests if it’s not supported. Patch by Victor
Stinner.
- Remove upstreamed patches:
- CVE-2026-1502-reject-CRLF-HTTP-tunnel.patch
- CVE-2026-4786-webbrowser-open-action.patch
- CVE-2026-6019-Morsel-js_output.patch
- CVE-2026-6100-use-after-free-decompression.patch
* Sun Jun 07 2026 mcepl@cepl.eu
- Remove remainders of installation of `python3`-related files.
* Sat Jun 06 2026 mcepl@suse.com
- Keep unversioned Python 3 development entry points in
python3-devel: python313-devel no longer provides python3-devel
and no longer owns libpython3.so, python3-config, python3.pc,
or python3-embed.pc. Do not package versioned GIL pkg-config
files in nogil-devel. Also, fix regular expressions in
rpmlintrc.
* Thu Jun 04 2026 mcepl@suse.com
- Add test_UDPLITE_support.patch (bsc#1263787,
gh#python/cpython!149081) improving testing for the support of
IPPROTO_UDPLITE, which could be not present although header
files are.
* Thu Jun 04 2026 mcepl@suse.com
- Add missing BR `crypto-policies-scripts` (need for the fix of
bsc#1211301).
* Mon Apr 27 2026 mcepl@cepl.eu
- CVE-2026-6019: protect against HTML injection by
Base64-encoding cookie values embedded in JS (bsc#1262654,
gh#python/cpython#90309)
CVE-2026-6019-Morsel-js_output.patch
* Sat Apr 25 2026 mcepl@cepl.eu
- CVE-2026-1502: reject CR/LF in HTTP tunnel request headers
(bsc#1261969, gh#python/cpython#146211)
CVE-2026-1502-reject-CRLF-HTTP-tunnel.patch
* Sat Apr 25 2026 mcepl@cepl.eu
- CVE-2026-4786: fix webbrowser %action substitution bypass of
dash-prefix check (bsc#1262319, gh#python/cpython#148169)
CVE-2026-4786-webbrowser-open-action.patch
* Fri Apr 24 2026 mcepl@cepl.eu
- CVE-2026-6100: prevent dangling pointer, which can end in the
use-after-free error (bsc#1262098, gh#python/cpython#148395)
CVE-2026-6100-use-after-free-decompression.patch
Version: 3.13.13-160000.1.1
* Wed Apr 08 2026 mcepl@cepl.eu
- Update to 3.13.13
- Security
- gh-145986: xml.parsers.expat: Fixed a crash caused by
unbounded C recursion when converting deeply nested XML
content models with ElementDeclHandler(). This addresses
CVE 2026-4224 (bsc#1259735, CVE-2026-4224).
- gh-145599: Reject control characters in http.cookies.Morsel
update() and js_output(). This addresses CVE 2026-3644
(bsc#1259734, CVE-2026-3644).
- gh-145506: Fixes CVE 2026-2297 by ensuring that
SourcelessFileLoader uses io.open_code() when opening .pyc
files (bsc#1259240, CVE-2026-2297).
- gh-144370: Disallow usage of control characters in status
in wsgiref.handlers to prevent HTTP header injections.
Patch by Benedikt Johannes.
- gh-143930: Reject leading dashes in URLs passed to
webbrowser.open() (bsc#1260026, CVE-2026-4519).
- Library
- gh-144503: Fix a regression introduced in 3.14.3 and
3.13.12 where the multiprocessing forkserver start method
would fail with BrokenPipeError when the parent process had
a very large sys.argv. The argv is now passed to the
forkserver as separate command-line arguments rather than
being embedded in the -c command string, avoiding the
operating system’s per-argument length limit.
- gh-146613: itertools: Fix a crash in itertools.groupby()
when the grouper iterator is concurrently mutated.
- gh-146080: ssl: fix a crash when an SNI callback tries to
use an SSL object that has already been garbage-collected.
Patch by Bénédikt Tran.
- gh-146090: sqlite3: fix a crash when
sqlite3.Connection.create_collation() fails with
SQLITE_BUSY. Patch by Bénédikt Tran.
- gh-146090: sqlite3: properly raise MemoryError instead of
SystemError when a context callback fails to be allocated.
Patch by Bénédikt Tran.
- gh-145633: Fix struct.pack('f', float): use PyFloat_Pack4()
to raise OverflowError. Patch by Sergey B Kirpichev and
Victor Stinner.
- gh-146310: The ensurepip module no longer looks for
pip-*.whl wheel packages in the current directory.
- gh-146083: Update bundled libexpat to version 2.7.5.
- gh-146076: zoneinfo: fix crashes when deleting _weak_cache
from a zoneinfo.ZoneInfo subclass.
- gh-146054: Limit the size of encodings.search_function()
cache. Found by OSS Fuzz in #493449985.
- gh-145883: zoneinfo: Fix heap buffer overflow reads from
malformed TZif data. Found by OSS Fuzz, issues #492245058
and #492230068.
- gh-145750: Avoid undefined behaviour from signed integer
overflow when parsing format strings in the struct module.
Found by OSS Fuzz in #488466741.
- gh-145492: Fix infinite recursion in
collections.defaultdict __repr__ when a defaultdict
contains itself. Based on analysis by KowalskiThomas in
gh-145492.
- gh-145623: Fix crash in struct when calling repr() or
__sizeof__() on an uninitialized struct.Struct object
created via Struct.__new__() without calling __init__().
- gh-145616: Detect Android sysconfig ABI correctly on 32-bit
ARM Android on 64-bit ARM kernel
- gh-145376: Fix null pointer dereference in unusual error
scenario in hashlib.
- gh-145551: Fix InvalidStateError when cancelling process
created by asyncio.create_subprocess_exec() or
asyncio.create_subprocess_shell(). Patch by Daan De Meyer.
- gh-145417: venv: Prevent incorrect preservation of SELinux
context when copying the Activate.ps1 script. The script
inherited the SELinux security context of the system
template directory, rather than the destination project
directory.
- gh-145301: hashlib: fix a crash when the initialization of
the underlying C extension module fails.
- gh-145264: Base64 decoder (see binascii.a2b_base64(),
base64.b64decode(), etc) no longer ignores excess data
after the first padded quad in non-strict (default) mode.
Instead, in conformance with RFC 4648, section 3.3, it now
ignores the pad character, “=”, if it is present before the
end of the encoded data (bsc#1261970, CVE-2026-3446).
- gh-145158: Avoid undefined behaviour from signed integer
overflow when parsing format strings in the struct module.
- gh-144984: Fix crash in
xml.parsers.expat.xmlparser.ExternalEntityParserCreate()
when an allocation fails. The error paths could dereference
NULL handlers and double-decrement the parent parser’s
reference count.
- gh-88091: Fix unicodedata.decomposition() for Hangul
characters.
- gh-144835: Added missing explanations for some parameters
in glob.glob() and glob.iglob().
- gh-144833: Fixed a use-after-free in ssl when SSL_new()
returns NULL in newPySSLSocket(). The error was reported
via a dangling pointer after the object had already been
freed.
- gh-144259: Fix inconsistent display of long multiline
pasted content in the REPL.
- gh-144156: Fix the folding of headers by the email library
when RFC 2047 encoded words are used. Now whitespace is
correctly preserved and also correctly added between
adjacent encoded words. The latter property was broken by
the fix for gh-92081, which mostly fixed previous failures
to preserve whitespace.
- gh-66305: Fixed a hang on Windows in the tempfile module
when trying to create a temporary file or subdirectory in
a non-writable directory.
- gh-140814: multiprocessing.freeze_support() no longer sets
the default start method as a side effect, which previously
caused a subsequent multiprocessing.set_start_method() call
to raise RuntimeError.
- gh-144475: Calling repr() on functools.partial() is now
safer when the partial object’s internal attributes are
replaced while the string representation is being
generated.
- gh-144538: Bump the version of pip bundled in ensurepip to
version 26.0.1
- gh-144363: Update bundled libexpat to 2.7.4
- gh-143637: Fixed a crash in socket.sendmsg() that could
occur if ancillary data is mutated re-entrantly during
argument parsing.
- gh-143880: Fix data race in functools.partial() in the free
threading build.
- gh-143543: Fix a crash in itertools.groupby that could
occur when a user-defined __eq__() method re-enters the
iterator during key comparison.
- gh-140652: Fix a crash in _interpchannels.list_all() after
closing a channel.
- gh-143698: Allow scheduler and setpgroup arguments to be
explicitly None when calling os.posix_spawn() or
os.posix_spawnp(). Patch by Bénédikt Tran.
- gh-143698: Raise TypeError instead of SystemError when the
scheduler in os.posix_spawn() or os.posix_spawnp() is not
a tuple. Patch by Bénédikt Tran.
- gh-143304: Fix ctypes.CDLL to honor the handle parameter on
POSIX systems.
- gh-142781: zoneinfo: fix a crash when instantiating
ZoneInfo objects for which the internal class-level cache
is inconsistent.
- gh-142763: Fix a race condition between zoneinfo.ZoneInfo
creation and zoneinfo.ZoneInfo.clear_cache() that could
raise KeyError.
- gh-142787: Fix assertion failure in sqlite3 blob subscript
when slicing with indices that result in an empty slice.
- gh-142352: Fix asyncio.StreamWriter.start_tls() to transfer
buffered data from StreamReader to the SSL layer,
preventing data loss when upgrading a connection to TLS
mid-stream (e.g., when implementing PROXY protocol
support).
- gh-141707: Don’t change tarfile.TarInfo type from AREGTYPE
to DIRTYPE when parsing GNU long name or link headers
(bsc#1259611, CVE-2025-13462).
- gh-139933: Improve AttributeError suggestions for classes
with a custom __dir__() method returning a list of
unsortable values. Patch by Bénédikt Tran.
- gh-138891: Fix SyntaxError when inspect.get_annotations(f,
eval_str=True) is called on a function annotated with a PEP
646 star_expression
- gh-137335: Get rid of any possibility of a name conflict
for named pipes in multiprocessing and asyncio on Windows,
no matter how small.
- gh-80667: Support lookup for Tangut Ideographs in
unicodedata.
- bpo-40243: Fix unicodedata.ucd_3_2_0.numeric() for
non-decimal values.
- Documentation
- gh-126676: Expand argparse documentation for type=bool with
a demonstration of the surprising behavior and pointers to
common alternatives.
- gh-145450: Document missing public wave.Wave_write getter
methods.
- Core and Builtins
- gh-148157: Fix an unlikely crash when parsing an invalid
type comments for function parameters. Found by OSS Fuzz in
[#492782951].
- gh-146615: Fix a crash in __get__() for METH_METHOD
descriptors when an invalid (non-type) object is passed as
the second argument. Patch by Steven Sun.
- gh-146128: Fix a bug which could cause constant values to
be partially corrupted in AArch64 JIT code. This issue is
theoretical, and hasn’t actually been observed in
unmodified Python interpreters.
- gh-146250: Fixed a memory leak in SyntaxError when
re-initializing it.
- gh-146245: Fixed reference leaks in socket when audit hooks
raise exceptions in socket.getaddrinfo() and
socket.sendto().
- gh-146227: Fix wrong type in _Py_atomic_load_uint16 in the
C11 atomics backend (pyatomic_std.h), which used a 32-bit
atomic load instead of 16-bit. Found by Mohammed Zuhaib.
- gh-146056: Fix repr() for lists containing NULLs.
- gh-145990: python --help-env sections are now sorted by
environment variable name.
- gh-145376: Fix GC tracking in structseq.__replace__().
- gh-142183: Avoid a pathological case where repeated calls
at a specific stack depth could be significantly slower.
- gh-145783: Fix an unlikely crash in the parser when certain
errors were erroneously not propagated. Found by OSS Fuzz
in #491369109.
- gh-145701: Fix SystemError when __classdict__ or
__conditional_annotations__ is in a class-scope inlined
comprehension. Found by OSS Fuzz in #491105000.
- gh-145335: Fix a crash in os.pathconf() when called with -1
as the path argument.
- gh-145234: Fixed a SystemError in the parser when an
encoding cookie (for example, UTF-7) decodes to carriage
returns (\r). Newlines are now normalized after decoding in
the string tokenizer.
- Patch by Pablo Galindo.
- gh-130555: Fix use-after-free in dict.clear() when the
dictionary values are embedded in an object and
a destructor causes re-entrant mutation of the dictionary.
- gh-145008: Fix a bug when calling certain methods at the
recursion limit which manifested as a corruption of
Python’s operand stack. Patch by Ken Jin.
- gh-144872: Fix heap buffer overflow in the parser found by
OSS-Fuzz.
- gh-144766: Fix a crash in fork child process when perf
support is enabled.
- gh-144759: Fix undefined behavior in the lexer when start
and multi_line_start pointers are NULL in
_PyLexer_remember_fstring_buffers() and
_PyLexer_restore_fstring_buffers(). The NULL pointer
arithmetic (NULL - valid_pointer) is now guarded with
explicit NULL checks.
- gh-144601: Fix crash when importing a module whose PyInit
function raises an exception from a subinterpreter.
- gh-143636: Fix a crash when calling
SimpleNamespace.__replace__() on non-namespace instances.
Patch by Bénédikt Tran.
- gh-143650: Fix race condition in importlib where a thread
could receive a stale module reference when another
thread’s import fails.
- gh-140594: Fix an out of bounds read when a single NUL
character is read from the standard input. Patch by Shamil
Abdulaev.
- gh-91636: While performing garbage collection, clear
weakrefs to unreachable objects that are created during
running of finalizers. If those weakrefs were are not
cleared, they could reveal unreachable objects.
- gh-130327: Fix erroneous clearing of an object’s __dict__
if overwritten at runtime.
- gh-80667: Literals using the \N{name} escape syntax can now
construct CJK ideographs and Hangul syllables using
case-insensitive names.
- Build
- gh-146541: The Android testbed can now be built for 32-bit
ARM and x86 targets.
- gh-146450: The Android build script was modified to improve
parity with other platform build scripts.
- gh-145801: When Python build is optimized with GCC using
PGO, use -fprofile-update=atomic option to use atomic
operations when updating profile information. This option
reduces the risk of gcov Data Files (.gcda) corruption
which can cause random GCC crashes. Patch by Victor
Stinner.
- gh-129259: Fix AIX build failures caused by incorrect
struct alignment in _Py_CODEUNIT and _Py_BackoffCounter by
adding AIX-specific #pragma pack directives.
- Tests
- gh-144418: The Android testbed’s emulator RAM has been
increased from 2 GB to 4 GB.
- gh-146202: Fix a race condition in regrtest: make sure that
the temporary directory is created in the worker process.
Previously, temp_cwd() could fail on Windows if the “build”
directory was not created. Patch by Victor Stinner.
- gh-144739: When Python was compiled with system expat older
then 2.7.2 but tests run with newer expat, still skip
test.test_pyexpat.MemoryProtectionTest.
- Removed upstreamed patches:
- CVE-2025-13462-tarinfo-header-parse.patch
- CVE-2026-2297-SourcelessFileLoader-io_open_code.patch
- CVE-2026-3479-pkgutil_get_data.patch
- CVE-2026-3644-cookies-Morsel-update-II.patch
- CVE-2026-4224-expat-unbound-C-recursion.patch
- CVE-2026-4519-webbrowser-open-dashes.patch
* Thu Apr 02 2026 mcepl@cepl.eu
- Add CVE-2026-3479-pkgutil_get_data.patch pkgutil.get_data() has
the same security model as open(). The documented limitations
ensure compatibility with non-filesystem loaders; Python
doesn't check that. (bsc#1259989, CVE-2026-3479,
gh#python/cpython#146121).
* Fri Mar 27 2026 mcepl@cepl.eu
- Add CVE-2026-4519-webbrowser-open-dashes.patch to reject
leading dashes in webbrowser URLs (bsc#1260026, CVE-2026-4519,
gh#python/cpython#143930).
* Wed Mar 25 2026 mcepl@cepl.eu
- Add CVE-2025-13462-tarinfo-header-parse.patch which skips
TarInfo DIRTYPE normalization during GNU long name handling
(bsc#1259611, CVE-2025-13462).
* Mon Mar 23 2026 mcepl@cepl.eu
- Add CVE-2026-4224-expat-unbound-C-recursion.patch avoiding
unbound C recursion in conv_content_model in pyexpat.c
(bsc#1259735, CVE-2026-4224).
* Mon Mar 23 2026 mcepl@cepl.eu
- Add CVE-2026-3644-cookies-Morsel-update-II.patch to reject
control characters in http.cookies.Morsel.update() and
http.cookies.BaseCookie.js_output (bsc#1259734, CVE-2026-3644).
* Wed Mar 18 2026 mcepl@cepl.eu
- Fix changelog
* Tue Mar 17 2026 mmachova@suse.com
- Adapt %suse_version checks to support new %suse_version design for
16.1 and following (jsc#PED-15850)
* Fri Mar 13 2026 mcepl@cepl.eu
- Add CVE-2026-2297-SourcelessFileLoader-io_open_code.patch
ensuring that `SourcelessFileLoader` uses `io.open_code` when
opening `.pyc` files (bsc#1259240, CVE-2026-2297).
Version: 3.13.12-160000.1.1
* Fri Feb 06 2026 mcepl@cepl.eu
- Update to 3.13.12: Python 3.13.12 final Release date:
2026-02-03
- Tools/Demos
- gh-142095: Make gdb ‘py-bt’ command use frame from thread
local state when available. Patch by Sam Gross and Victor
Stinner.
- Tests
- gh-144415: The Android testbed now distinguishes between
stdout/stderr messages which were triggered by a newline,
and those triggered by a manual call to flush. This fixes
logging of progress indicators and similar content.
- gh-65784: Add support for parametrized resource wantobjects
in regrtests, which allows to run Tkinter tests with the
specified value of tkinter.wantobjects, for example -u
wantobjects=0.
- gh-143553: Add support for parametrized resources, such as
- u xpickle=2.7.
- gh-142836: Accommodated Solaris in
test_pdb.test_script_target_anonymous_pipe.
- gh-129401: Fix a flaky test in test_repr_rlock that checks
the representation of multiprocessing.RLock.
- bpo-31391: Forward-port test_xpickle from Python 2 to
Python 3 and add the resource back to test’s command line.
- Security
- gh-144125: BytesGenerator will now refuse to serialize
(write) headers that are unsafely folded or delimited; see
verify_generated_headers. (Contributed by Bas Bloemsaat and
Petr Viktorin in gh-121650) (bsc#1257181, CVE-2026-1299).
- gh-143935: Fixed a bug in the folding of comments when
flattening an email message using a modern email policy.
Comments consisting of a very long sequence of non-foldable
characters could trigger a forced line wrap that omitted
the required leading space on the continuation line,
causing the remainder of the comment to be interpreted as
a new header field. This enabled header injection with
carefully crafted inputs (bsc#1257029, CVE-2025-11468).
- gh-143925: Reject control characters in data: URL media
types (bsc#1257046, CVE-2025-15282).
- gh-143919: Reject control characters in http.cookies.Morsel
fields and values (bsc#1257031, CVE-2026-0672).
- gh-143916: Reject C0 control characters within
wsgiref.headers.Headers fields, values, and parameters
(bsc#1257042, CVE-2026-0865).
- Library
- gh-144380: Improve performance of io.BufferedReader line
iteration by ~49%.
- gh-144169: Fix three crashes when non-string keyword
arguments are supplied to objects in the ast module.
- gh-144100: Fixed a crash in ctypes when using a deprecated
POINTER(str) type in argtypes. Instead of aborting, ctypes
now raises a proper Python exception when the pointer
target type is unresolved.
- gh-144050: Fix stat.filemode() in the pure-Python
implementation to avoid misclassifying invalid mode values
as block devices.
- gh-144023: Fixed validation of file descriptor 0 in posix
functions when used with follow_symlinks parameter.
- gh-143999: Fix an issue where inspect.getgeneratorstate()
and inspect.getcoroutinestate() could fail for generators
wrapped by types.coroutine() in the suspended state.
- gh-143706: Fix multiprocessing forkserver so that sys.argv
is correctly set before __main__ is preloaded. Previously,
sys.argv was empty during main module import in forkserver
child processes. This fixes a regression introduced in
3.13.8 and 3.14.1. Root caused by Aaron Wieczorek, test
provided by Thomas Watson, thanks!
- gh-143638: Forbid reentrant calls of the pickle.Pickler and
pickle.Unpickler methods for the C implementation.
Previously, this could cause crash or data corruption, now
concurrent calls of methods of the same object raise
RuntimeError.
- gh-78724: Raise RuntimeError’s when user attempts to call
methods on half-initialized Struct objects, For example,
created by Struct.__new__(Struct). Patch by Sergey
B Kirpichev.
- gh-143602: Fix a inconsistency issue in write() that leads
to unexpected buffer overwrite by deduplicating the buffer
exports.
- gh-143547: Fix sys.unraisablehook() when the hook raises an
exception and changes sys.unraisablehook(): hold a strong
reference to the old hook. Patch by Victor Stinner.
- gh-143378: Fix use-after-free crashes when a BytesIO object
is concurrently mutated during write() or writelines().
- gh-143346: Fix incorrect wrapping of the Base64 data in
plistlib._PlistWriter when the indent contains a mix of
tabs and spaces.
- gh-143310: tkinter: fix a crash when a Python list is
mutated during the conversion to a Tcl object (e.g., when
setting a Tcl variable). Patch by Bénédikt Tran.
- gh-143309: Fix a crash in os.execve() on non-Windows
platforms when given a custom environment mapping which is
then mutated during parsing. Patch by Bénédikt Tran.
- gh-143308: pickle: fix use-after-free crashes when
a PickleBuffer is concurrently mutated by a custom buffer
callback during pickling. Patch by Bénédikt Tran and Aaron
Wieczorek.
- gh-143237: Fix support of named pipes in the rotating
logging handlers.
- gh-143249: Fix possible buffer leaks in Windows overlapped
I/O on error handling.
- gh-143241: zoneinfo: fix infinite loop in
ZoneInfo.from_file when parsing a malformed TZif file.
Patch by Fatih Celik.
- gh-142830: sqlite3: fix use-after-free crashes when the
connection’s callbacks are mutated during a callback
execution. Patch by Bénédikt Tran.
- gh-143200: xml.etree.ElementTree: fix use-after-free
crashes in __getitem__() and __setitem__() methods of
Element when the element is concurrently mutated. Patch by
Bénédikt Tran.
- gh-142195: Updated timeout evaluation logic in subprocess
to be compatible with deterministic environments like
Shadow where time moves exactly as requested.
- gh-143145: Fixed a possible reference leak in ctypes when
constructing results with multiple output parameters on
error.
- gh-122431: Corrected the error message in
readline.append_history_file() to state that nelements must
be non-negative instead of positive.
- gh-143004: Fix a potential use-after-free in
collections.Counter.update() when user code mutates the
Counter during an update.
- gh-143046: The asyncio REPL no longer prints copyright and
version messages in the quiet mode (-q). Patch by Bartosz
Sławecki.
- gh-140648: The asyncio REPL now respects the -I flag
(isolated mode). Previously, it would load and execute
PYTHONSTARTUP even if the flag was set. Contributed by
Bartosz Sławecki.
- gh-142991: Fixed socket operations such as recvfrom() and
sendto() for FreeBSD divert(4) socket.
- gh-143010: Fixed a bug in mailbox where the precise timing
of an external event could result in the library opening an
existing file instead of a file it expected to create.
- gh-142881: Fix concurrent and reentrant call of
atexit.unregister().
- gh-112127: Fix possible use-after-free in
atexit.unregister() when the callback is unregistered
during comparison.
- gh-142783: Fix zoneinfo use-after-free with descriptor
_weak_cache. a descriptor as _weak_cache could cause
crashes during object creation. The fix ensures proper
reference counting for descriptor-provided objects.
- gh-142754: Add the ownerDocument attribute to
xml.dom.minidom elements and attributes created by directly
instantiating the Element or Attr class. Note that this way
of creating nodes is not supported; creator functions like
xml.dom.Document.documentElement() should be used instead.
- gh-142784: The asyncio REPL now properly closes the loop
upon the end of interactive session. Previously, it could
cause surprising warnings. Contributed by Bartosz Sławecki.
- gh-142555: array: fix a crash in a[i] = v when converting
i to an index via i.__index__ or i.__float__ mutates the
array.
- gh-142594: Fix crash in TextIOWrapper.close() when the
underlying buffer’s closed property calls detach().
- gh-142451: hmac: Ensure that the HMAC.block_size attribute
is correctly copied by HMAC.copy. Patch by Bénédikt Tran.
- gh-142495: collections.defaultdict now prioritizes
__setitem__() when inserting default values from
default_factory. This prevents race conditions where
a default value would overwrite a value set before
default_factory returns.
- gh-142651: unittest.mock: fix a thread safety issue where
Mock.call_count may return inaccurate values when the mock
is called concurrently from multiple threads.
- gh-142595: Added type check during initialization of the
decimal module to prevent a crash in case of broken stdlib.
Patch by Sergey B Kirpichev.
- gh-142517: The non-compat32 email policies now correctly
handle refolding encoded words that contain bytes that can
not be decoded in their specified character set. Previously
this resulted in an encoding exception during folding.
- gh-112527: The help text for required options in argparse
no longer extended with “ (default: None)”.
- gh-142315: Pdb can now run scripts from anonymous pipes
used in process substitution. Patch by Bartosz Sławecki.
- gh-142282: Fix winreg.QueryValueEx() to not accidentally
read garbage buffer under race condition.
- gh-75949: Fix argparse to preserve | separators in mutually
exclusive groups when the usage line wraps due to length.
- gh-68552: MisplacedEnvelopeHeaderDefect and Missing header
name defects are now correctly passed to the handle_defect
method of policy in FeedParser.
- gh-142006: Fix a bug in the email.policy.default folding
algorithm which incorrectly resulted in a doubled newline
when a line ending at exactly max_line_length was followed
by an unfoldable token.
- gh-105836: Fix asyncio.run_coroutine_threadsafe() leaving
underlying cancelled asyncio task running.
- gh-139971: pydoc: Ensure that the link to the online
documentation of a stdlib module is correct.
- gh-139262: Some keystrokes can be swallowed in the new
PyREPL on Windows, especially when used together with the
ALT key. Fix by Chris Eibl.
- gh-138897: Improved license/copyright/credits display in
the REPL: now uses a pager.
- gh-79986: Add parsing for References and In-Reply-To
headers to the email library that parses the header content
as lists of message id tokens. This prevents them from
being folded incorrectly.
- gh-109263: Starting a process from spawn context in
multiprocessing no longer sets the start method globally.
- gh-90871: Fixed an off by one error concerning the backlog
parameter in create_unix_server(). Contributed by Christian
Harries.
- gh-133253: Fix thread-safety issues in linecache.
- gh-132715: Skip writing objects during marshalling once
a failure has occurred.
- gh-127529: Correct behavior of
asyncio.selector_events.BaseSelectorEventLoop._accept_connection()
in handling ConnectionAbortedError in a loop. This improves
performance on OpenBSD.
- IDLE
- gh-143774: Better explain the operation of Format / Format
Paragraph.
- Documentation
- gh-140806: Add documentation for enum.bin().
- Core and Builtins
- gh-144307: Prevent a reference leak in module teardown at
interpreter finalization.
- gh-144194: Fix error handling in perf jitdump
initialization on memory allocation failure.
- gh-141805: Fix crash in set when objects with the same hash
are concurrently added to the set after removing an element
with the same hash while the set still contains elements
with the same hash.
- gh-143670: Fixes a crash in ga_repr_items_list function.
- gh-143377: Fix a crash in _interpreters.capture_exception()
when the exception is incorrectly formatted. Patch by
Bénédikt Tran.
- gh-143189: Fix crash when inserting a non-str key into
a split table dictionary when the key matches an existing
key in the split table but has no corresponding value in
the dict.
- gh-143228: Fix use-after-free in perf trampoline when
toggling profiling while threads are running or during
interpreter finalization with daemon threads active. The
fix uses reference counting to ensure trampolines are not
freed while any code object could still reference them.
Pach by Pablo Galindo
- gh-142664: Fix a use-after-free crash in
memoryview.__hash__ when the __hash__ method of the
referenced object mutates that object or the view. Patch by
Bénédikt Tran.
- gh-142557: Fix a use-after-free crash in bytearray.__mod__
when the bytearray is mutated while formatting the %-style
arguments. Patch by Bénédikt Tran.
- gh-143195: Fix use-after-free crashes in bytearray.hex()
and memoryview.hex() when the separator’s __len__() mutates
the original object. Patch by Bénédikt Tran.
- gh-143135: Set sys.flags.inspect to 1 when PYTHONINSPECT is
0. Previously, it was set to 0 in this case.
- gh-143003: Fix an overflow of the shared empty buffer in
bytearray.extend() when __length_hint__() returns 0 for
non-empty iterator.
- gh-143006: Fix a possible assertion error when comparing
negative non-integer float and int with the same number of
bits in the integer part.
- gh-142776: Fix a file descriptor leak in import.c
- gh-142829: Fix a use-after-free crash in
contextvars.Context comparison when a custom __eq__ method
modifies the context via set().
- gh-142766: Clear the frame of a generator when
generator.close() is called.
- gh-142737: Tracebacks will be displayed in fallback mode
even if io.open() is lost. Previously, this would crash the
interpreter. Patch by Bartosz Sławecki.
- gh-142554: Fix a crash in divmod() when
_pylong.int_divmod() does not return a tuple of length two
exactly. Patch by Bénédikt Tran.
- gh-142560: Fix use-after-free in bytearray search-like
methods (find(), count(), index(), rindex(), and rfind())
by marking the storage as exported which causes
reallocation attempts to raise BufferError. For contains(),
split(), and rsplit() the buffer protocol is used for this.
- gh-142343: Fix SIGILL crash on m68k due to incorrect
assembly constraint.
- gh-141732: Ensure the __repr__() for ExceptionGroup and
BaseExceptionGroup does not change when the exception
sequence that was original passed in to its constructor is
subsequently mutated.
- gh-100964: Fix reference cycle in exhausted generator
frames. Patch by Savannah Ostrowski.
- gh-140373: Correctly emit PY_UNWIND event when generator
object is closed. Patch by Mikhail Efimov.
- gh-138568: Adjusted the built-in help() function so that
empty inputs are ignored in interactive mode.
- gh-127773: Do not use the type attribute cache for types
with incompatible MRO.
- C API
- gh-142571: PyUnstable_CopyPerfMapFile() now checks that
opening the file succeeded before flushing.
- Build
- gh-142454: When calculating the digest of the JIT stencils
input, sort the hashed files by filenames before adding
their content to the hasher. This ensures deterministic
hash input and hence deterministic hash, independent on
filesystem order.
- gh-141808: When running make clean-retain-profile, keep the
generated JIT stencils. That way, the stencils are not
generated twice when Profile-guided optimization (PGO) is
used. It also allows distributors to supply their own
pre-built JIT stencils.
- gh-138061: Ensure reproducible builds by making JIT stencil
header generation deterministic.
- Remove upstreamed patches:
- CVE-2024-6923-follow-up-EOL-email-headers.patch
- gh138131-exclude-pycache-from-digest.patch
* Tue Jan 27 2026 mcepl@cepl.eu
- Add CVE-2024-6923-follow-up-EOL-email-headers.patch which is
a follow-up to the previous fix of CVE-2024-6923 further
encoding EOL possibly hidden in email headers (bsc#1257181).
Version: 3.13.11-160000.1.1
* Thu Dec 11 2025 mcepl@cepl.eu
- Update to 3.13.11:
- gh-142145: Remove quadratic behavior in xml.minidom node ID
cache clearing (CVE-2025-12084, bsc#1254997).
- gh-119451: Fix a potential memory denial of service in the
http.client module. When connecting to a malicious server,
it could cause an arbitrary amount of memory to be
allocated. This could have led to symptoms including
a MemoryError, swapping, out of memory (OOM) killed
processes or containers, or even system crashes
(bsc#1254400, CVE-2025-13836).
- gh-119452: Fix a potential memory denial of service in the
http.server module. When a malicious user is connected to
the CGI server on Windows, it could cause an arbitrary
amount of memory to be allocated. This could have led to
symptoms including a MemoryError, swapping, out of memory
(OOM) killed processes or containers, or even system
crashes.
- Library
- gh-140797: Revert changes to the undocumented re.Scanner
class. Capturing groups are still allowed for backward
compatibility, although using them can lead to incorrect
result. They will be forbidden in future Python versions.
- gh-142206: The resource tracker in the multiprocessing
module now uses the original communication protocol, as in
Python 3.14.0 and below, by default. This avoids issues
with upgrading Python while it is running. (Note that such
‘in-place’ upgrades are not tested.) The tracker remains
compatible with subprocesses that use new protocol (that
is, subprocesses using Python 3.13.10, 3.14.1 and 3.15).
- Core and Builtins
- gh-142218: Fix crash when inserting into a split table
dictionary with a non str key that matches an existing key.
- Update to 3.13.10:
- Tools/Demos
- gh-141442: The iOS testbed now correctly handles test
arguments that contain spaces.
- Tests
- gh-140482: Preserve and restore the state of stty echo as
part of the test environment.
- gh-140082: Update python -m test to set FORCE_COLOR=1 when
being run with color enabled so that unittest which is run
by it with redirected output will output in color.
- gh-136442: Use exitcode 1 instead of 5 if
unittest.TestCase.setUpClass() raises an exception
- Security
- gh-139700: Check consistency of the zip64 end of central
directory record. Support records with “zip64 extensible
data” if there are no bytes prepended to the ZIP file.
(CVE-2025-8291, bsc#1251305)
- gh-137836: Add support of the “plaintext” element, RAWTEXT
elements “xmp”, “iframe”, “noembed” and “noframes”, and
optionally RAWTEXT element “noscript” in
html.parser.HTMLParser.
- gh-136063: email.message: ensure linear complexity for
legacy HTTP parameters parsing. Patch by Bénédikt Tran.
- gh-136065: Fix quadratic complexity in
os.path.expandvars() (CVE-2025-6075, bsc#1252974).
- gh-119342: Fix a potential memory denial of service in the
plistlib module. When reading a Plist file received from
untrusted source, it could cause an arbitrary amount of
memory to be allocated. This could have led to symptoms
including a MemoryError, swapping, out of memory (OOM)
killed processes or containers, or even system crashes
(CVE-2025-13837, bsc#1254401).
- Library
- gh-74389: When the stdin being used by a subprocess.Popen
instance is closed, this is now ignored in
subprocess.Popen.communicate() instead of leaving the class
in an inconsistent state.
- gh-87512: Fix subprocess.Popen.communicate() timeout
handling on Windows when writing large input. Previously,
the timeout was ignored during stdin writing, causing the
method to block indefinitely if the child process did not
consume input quickly. The stdin write is now performed in
a background thread, allowing the timeout to be properly
enforced.
- gh-141473: When subprocess.Popen.communicate() was called
with input and a timeout and is called for a second time
after a TimeoutExpired exception before the process has
died, it should no longer hang.
- gh-59000: Fix pdb breakpoint resolution for class methods
when the module defining the class is not imported.
- gh-141570: Support file-like object raising OSError from
fileno() in color detection (_colorize.can_colorize()).
This can occur when sys.stdout is redirected.
- gh-141659: Fix bad file descriptor errors from
_posixsubprocess on AIX.
- gh-141497: ipaddress: ensure that the methods
IPv4Network.hosts() and IPv6Network.hosts() always return
an iterator.
- gh-140938: The statistics.stdev() and statistics.pstdev()
functions now raise a ValueError when the input contains an
infinity or a NaN.
- gh-124111: Updated Tcl threading configuration in _tkinter
to assume that threads are always available in Tcl 9 and
later.
- gh-137109: The os.fork and related forking APIs will no
longer warn in the common case where Linux or macOS
platform APIs return the number of threads in a process and
find the answer to be 1 even when a os.register_at_fork()
after_in_parent= callback (re)starts a thread.
- gh-141314: Fix assertion failure in io.TextIOWrapper.tell()
when reading files with standalone carriage return (\r)
line endings.
- gh-141311: Fix assertion failure in io.BytesIO.readinto()
and undefined behavior arising when read position is above
capcity in io.BytesIO.
- gh-141141: Fix a thread safety issue with
base64.b85decode(). Contributed by Benel Tayar.
- gh-140911: collections: Ensure that the methods
UserString.rindex() and UserString.index() accept
collections.UserString instances as the sub argument.
- gh-140797: The undocumented re.Scanner class now forbids
regular expressions containing capturing groups in its
lexicon patterns. Patterns using capturing groups could
previously lead to crashes with segmentation fault. Use
non-capturing groups (?:…) instead.
- gh-140815: faulthandler now detects if a frame or a code
object is invalid or freed. Patch by Victor Stinner.
- gh-100218: Correctly set errno when socket.if_nametoindex()
or socket.if_indextoname() raise an OSError. Patch by
Bénédikt Tran.
- gh-140875: Fix handling of unclosed character references
(named and numerical) followed by the end of file in
html.parser.HTMLParser with convert_charrefs=False.
- gh-140734: multiprocessing: fix off-by-one error when
checking the length of a temporary socket file path. Patch
by Bénédikt Tran.
- gh-140874: Bump the version of pip bundled in ensurepip to
version 25.3
- gh-140691: In urllib.request, when opening a FTP URL fails
because a data connection cannot be made, the control
connection’s socket is now closed to avoid
a ResourceWarning.
- gh-103847: Fix hang when cancelling process created by
asyncio.create_subprocess_exec() or
asyncio.create_subprocess_shell(). Patch by Kumar Aditya.
- gh-140590: Fix arguments checking for the
functools.partial.__setstate__() that may lead to internal
state corruption and crash. Patch by Sergey Miryanov.
- gh-140634: Fix a reference counting bug in
os.sched_param.__reduce__().
- gh-140633: Ignore AttributeError when setting a module’s
__file__ attribute when loading an extension module
packaged as Apple Framework.
- gh-140593: xml.parsers.expat: Fix a memory leak that could
affect users with ElementDeclHandler() set to a custom
element declaration handler. Patch by Sebastian Pipping.
- gh-140607: Inside io.RawIOBase.read(), validate that the
count of bytes returned by io.RawIOBase.readinto() is valid
(inside the provided buffer).
- gh-138162: Fix logging.LoggerAdapter with merge_extra=True
and without the extra argument.
- gh-140474: Fix memory leak in array.array when creating
arrays from an empty str and the u type code.
- gh-140272: Fix memory leak in the clear() method of the
dbm.gnu database.
- gh-140041: Fix import of ctypes on Android and Cygwin when
ABI flags are present.
- gh-139905: Add suggestion to error message for
typing.Generic subclasses when cls.__parameters__ is
missing due to a parent class failing to call
super().__init_subclass__() in its __init_subclass__.
- gh-139845: Fix to not print KeyboardInterrupt twice in
default asyncio REPL.
- gh-139783: Fix inspect.getsourcelines() for the case when
a decorator is followed by a comment or an empty line.
- gh-70765: http.server: fix default handling of HTTP/0.9
requests in BaseHTTPRequestHandler. Previously,
BaseHTTPRequestHandler.parse_request() incorrectly waited
for headers in the request although those are not supported
in HTTP/0.9. Patch by Bénédikt Tran.
- gh-139391: Fix an issue when, on non-Windows platforms, it
was not possible to gracefully exit a python -m asyncio
process suspended by Ctrl+Z and later resumed by fg other
than with kill.
- gh-101828: Fix 'shift_jisx0213', 'shift_jis_2004',
'euc_jisx0213' and 'euc_jis_2004' codecs truncating null
chars as they were treated as part of multi-character
sequences.
- gh-139246: fix: paste zero-width in default repl width is
wrong.
- gh-90949: Add SetAllocTrackerActivationThreshold() and
SetAllocTrackerMaximumAmplification() to xmlparser objects
to prevent use of disproportional amounts of dynamic memory
from within an Expat parser. Patch by Bénédikt Tran.
- gh-139065: Fix trailing space before a wrapped long word if
the line length is exactly width in textwrap.
- gh-138993: Dedent credits text.
- gh-138859: Fix generic type parameterization raising
a TypeError when omitting a ParamSpec that has a default
which is not a list of types.
- gh-138775: Use of python -m with base64 has been fixed to
detect input from a terminal so that it properly notices
EOF.
- gh-98896: Fix a failure in multiprocessing resource_tracker
when SharedMemory names contain colons. Patch by Rani
Pinchuk.
- gh-75989: tarfile.TarFile.extractall() and
tarfile.TarFile.extract() now overwrite symlinks when
extracting hardlinks. (Contributed by Alexander Enrique
Urieles Nieto in gh-75989.)
- gh-83424: Allows creating a ctypes.CDLL without name when
passing a handle as an argument.
- gh-136234: Fix asyncio.WriteTransport.writelines() to be
robust to connection failure, by using the same behavior as
write().
- gh-136057: Fixed the bug in pdb and bdb where next and step
can’t go over the line if a loop exists in the line.
- gh-135307: email: Fix exception in set_content() when
encoding text and max_line_length is set to 0 or None
(unlimited).
- gh-134453: Fixed subprocess.Popen.communicate() input=
handling of memoryview instances that were non-byte shaped
on POSIX platforms. Those are now properly cast to a byte
shaped view instead of truncating the input. Windows
platforms did not have this bug.
- gh-102431: Clarify constraints for “logical” arguments in
methods of decimal.Context.
- IDLE
- gh-96491: Deduplicate version number in IDLE shell title
bar after saving to a file.
- Documentation
- gh-141994: xml.sax.handler: Make Documentation of
xml.sax.handler.feature_external_ges warn of opening up to
external entity attacks. Patch by Sebastian Pipping.
- gh-140578: Remove outdated sencence in the documentation
for multiprocessing, that implied that
concurrent.futures.ThreadPoolExecutor did not exist.
- Core and Builtins
- gh-142048: Fix quadratically increasing garbage collection
delays in free-threaded build.
- gh-141930: When importing a module, use Python’s regular
file object to ensure that writes to .pyc files are
complete or an appropriate error is raised.
- gh-120158: Fix inconsistent state when enabling or
disabling monitoring events too many times.
- gh-141579: Fix sys.activate_stack_trampoline() to properly
support the perf_jit backend. Patch by Pablo Galindo.
- gh-141312: Fix the assertion failure in the __setstate__
method of the range iterator when a non-integer argument is
passed. Patch by Sergey Miryanov.
- gh-140939: Fix memory leak when bytearray or bytes is
formated with the
%*b format with a large width that results in
%a MemoryError.
- gh-140530: Fix a reference leak when raise exc from cause
fails. Patch by Bénédikt Tran.
- gh-140576: Fixed crash in tokenize.generate_tokens() in
case of specific incorrect input. Patch by Mikhail Efimov.
- gh-140551: Fixed crash in dict if dict.clear() is called at
the lookup stage. Patch by Mikhail Efimov and Inada Naoki.
- gh-140471: Fix potential buffer overflow in ast.AST node
initialization when encountering malformed _fields
containing non-str.
- gh-140406: Fix memory leak when an object’s __hash__()
method returns an object that isn’t an int.
- gh-140306: Fix memory leaks in cross-interpreter channel
operations and shared namespace handling.
- gh-140301: Fix memory leak of PyConfig in subinterpreters.
- gh-140000: Fix potential memory leak when a reference cycle
exists between an instance of typing.TypeAliasType,
typing.TypeVar, typing.ParamSpec, or typing.TypeVarTuple
and its __name__ attribute. Patch by Mikhail Efimov.
- gh-139748: Fix reference leaks in error branches of
functions accepting path strings or bytes such as compile()
and os.system(). Patch by Bénédikt Tran.
- gh-139516: Fix lambda colon erroneously start format spec
in f-string in tokenizer.
- gh-139640: Fix swallowing some syntax warnings in different
modules if they accidentally have the same message and are
emitted from the same line. Fix duplicated warnings in the
finally block.
- gh-137400: Fix a crash in the free threading build when
disabling profiling or tracing across all threads with
PyEval_SetProfileAllThreads() or
PyEval_SetTraceAllThreads() or their Python equivalents
threading.settrace_all_threads() and
threading.setprofile_all_threads().
- gh-133400: Fixed Ctrl+D (^D) behavior in _pyrepl module to
match old pre-3.13 REPL behavior.
- C API
- gh-140042: Removed the sqlite3_shutdown call that could
cause closing connections for sqlite when used with
multiple sub interpreters.
- gh-140487: Fix Py_RETURN_NOTIMPLEMENTED in limited C API
3.11 and older: don’t treat Py_NotImplemented as immortal.
Patch by Victor Stinner.
- Remove upstreamed patches:
- CVE-2025-13836-http-resp-cont-len.patch
- CVE-2025-8291-consistency-zip64.patch
- CVE-2025-6075-expandvars-perf-degrad.patch
* Wed Nov 19 2025 mcepl@suse.com
- Add pass-test_write_read_limited_history.patch:
Fix readline history truncation when length is reduced
The `readline.set_history_length()` function did not previously
truncate the in-memory history when the new length was set to
a value smaller than the current number of history items. This
could lead to unexpected behavior where `get_history_length()`
would still report the old length and writing the history to a
file would write more entries than the new limit.
This patch modifies `set_history_length()` to explicitly
remove the oldest history entries using `remove_history()`
when the length is decreased, ensuring the in-memory history
is correctly truncated to the new limit. This brings the
function's behavior in line with expectations and fixes
failures in `test_write_read_limited_history`.
* Thu Nov 13 2025 mcepl@cepl.eu
- Add CVE-2025-6075-expandvars-perf-degrad.patch avoid simple
quadratic complexity vulnerabilities of os.path.expandvars()
(CVE-2025-6075, bsc#1252974).
* Tue Nov 04 2025 mcepl@cepl.eu
- Add CVE-2025-8291-consistency-zip64.patch which checks
consistency of the zip64 end of central directory record, and
preventing obfuscation of the payload, i.e., you scanning for
malicious content in a ZIP file with one ZIP parser (let's say
a Rust one) then unpack it in production with another (e.g.,
the Python one) and get malicious content that the other parser
did not see (CVE-2025-8291, bsc#1251305)
- Readjust patches while synchronizing between openSUSE and SLE trees:
- F00251-change-user-install-location.patch
- doc-py38-to-py36.patch
- gh126985-mv-pyvenv.cfg2getpath.patch
* Wed Oct 15 2025 daniel.garcia@suse.com
- Update to 3.13.9:
- Library
- gh-139783: Fix inspect.getsourcelines() for the case when a
decorator is followed by a comment or an empty line.
- Update to 3.13.8:
- macOS
- gh-124111: Update macOS installer to use Tcl/Tk 8.6.17.
- gh-139573: Updated bundled version of OpenSSL to 3.0.18.
- Windows
- gh-139573: Updated bundled version of OpenSSL to 3.0.18.
- gh-138896: Fix error installing C runtime on non-updated Windows
machines
- Tools/Demos
- gh-139330: SBOM generation tool didn’t cross-check the version
and checksum values against the Modules/expat/refresh.sh script,
leading to the values becoming out-of-date during routine
updates.
- gh-137873: The iOS test runner has been simplified, resolving
some issues that have been observed using the runner in GitHub
Actions and Azure Pipelines test environments.
- Tests
- gh-139208: Fix regrtest --fast-ci --verbose: don’t ignore the
- -verbose option anymore. Patch by Victor Stinner.
- Security
- gh-139400: xml.parsers.expat: Make sure that parent Expat
parsers are only garbage-collected once they are no longer
referenced by subparsers created by
ExternalEntityParserCreate(). Patch by Sebastian Pipping.
- gh-139283: sqlite3: correctly handle maximum number of rows to
fetch in Cursor.fetchmany and reject negative values for
Cursor.arraysize. Patch by Bénédikt Tran.
- gh-135661: Fix CDATA section parsing in html.parser.HTMLParser
according to the HTML5 standard: ] ]> and ]] > no longer end the
CDATA section. Add private method _set_support_cdata() which can
be used to specify how to parse <[CDATA[ — as a CDATA section in
foreign content (SVG or MathML) or as a bogus comment in the
HTML namespace.
- Library
- gh-139312: Upgrade bundled libexpat to 2.7.3
- gh-139289: Do a real lazy-import on rlcompleter in pdb and
restore the existing completer after importing rlcompleter.
- gh-139210: Fix use-after-free when reporting unknown event in
xml.etree.ElementTree.iterparse(). Patch by Ken Jin.
- gh-138860: Lazy import rlcompleter in pdb to avoid deadlock in
subprocess.
- gh-112729: Fix crash when calling _interpreters.create when the
process is out of memory.
- gh-139076: Fix a bug in the pydoc module that was hiding
functions in a Python module if they were implemented in an
extension module and the module did not have __all__.
- gh-138998: Update bundled libexpat to 2.7.2
- gh-130567: Fix possible crash in locale.strxfrm() due to a
platform bug on macOS.
- gh-138779: Support device numbers larger than 2**63-1 for the
st_rdev field of the os.stat_result structure.
- gh-128636: Fix crash in PyREPL when os.environ is overwritten
with an invalid value for mac
- gh-88375: Fix normalization of the robots.txt rules and URLs in
the urllib.robotparser module. No longer ignore trailing ?.
Distinguish raw special characters ?, = and & from the
percent-encoded ones.
- gh-138515: email is added to Emscripten build.
- gh-111788: Fix parsing errors in the urllib.robotparser module.
Don’t fail trying to parse weird paths. Don’t fail trying to
decode non-UTF-8 robots.txt files.
- gh-138432: zoneinfo.reset_tzpath() will now convert any
os.PathLike objects it receives into strings before adding them
to TZPATH. It will raise TypeError if anything other than a
string is found after this conversion. If given an os.PathLike
object that represents a relative path, it will now raise
ValueError instead of TypeError, and present a more informative
error message.
- gh-138008: Fix segmentation faults in the ctypes module due to
invalid argtypes. Patch by Dung Nguyen.
- gh-60462: Fix locale.strxfrm() on Solaris (and possibly other
platforms).
- gh-138204: Forbid expansion of shared anonymous memory maps on
Linux, which caused a bus error.
- gh-138010: Fix an issue where defining a class with a
@warnings.deprecated-decorated base class may not invoke the
correct __init_subclass__() method in cases involving multiple
inheritance. Patch by Brian Schubert.
- gh-138133: Prevent infinite traceback loop when sending CTRL^C
to Python through strace.
- gh-134869: Fix an issue where pressing Ctrl+C during tab
completion in the REPL would leave the autocompletion menu in a
corrupted state.
- gh-137317: inspect.signature() now correctly handles classes
that use a descriptor on a wrapped __init__() or __new__()
method. Contributed by Yongyu Yan.
- gh-137754: Fix import of the zoneinfo module if the C
implementation of the datetime module is not available.
- gh-137490: Handle ECANCELED in the same way as EINTR in
signal.sigwaitinfo() on NetBSD.
- gh-137477: Fix inspect.getblock(), inspect.getsourcelines() and
inspect.getsource() for generator expressions.
- gh-137017: Fix threading.Thread.is_alive to remain True until
the underlying OS thread is fully cleaned up. This avoids false
negatives in edge cases involving thread monitoring or premature
threading.Thread.is_alive calls.
- gh-136134: SMTP.auth_cram_md5() now raises an SMTPException
instead of a ValueError if Python has been built without MD5
support. In particular, SMTP clients will not attempt to use
this method even if the remote server is assumed to support it.
Patch by Bénédikt Tran.
- gh-136134: IMAP4.login_cram_md5 now raises an IMAP4.error if
CRAM-MD5 authentication is not supported. Patch by Bénédikt
Tran.
- gh-135386: Fix opening a dbm.sqlite3 database for reading from
read-only file or directory.
- gh-126631: Fix multiprocessing forkserver bug which prevented
__main__ from being preloaded.
- gh-123085: In a bare call to importlib.resources.files(), ensure
the caller’s frame is properly detected when importlib.resources
is itself available as a compiled module only (no source).
- gh-118981: Fix potential hang in
multiprocessing.popen_spawn_posix that can happen when the child
proc dies early by closing the child fds right away.
- gh-78319: UTF8 support for the IMAP APPEND command has been made
RFC compliant.
- bpo-38735: Fix failure when importing a module from the root
directory on unix-like platforms with sys.pycache_prefix set.
- bpo-41839: Allow negative priority values from
os.sched_get_priority_min() and os.sched_get_priority_max()
functions.
- Core and Builtins
- gh-134466: Don’t run PyREPL in a degraded environment where
setting termios attributes is not allowed.
- gh-71810: Raise OverflowError for (-1).to_bytes() for signed
conversions when bytes count is zero. Patch by Sergey B
Kirpichev.
- gh-105487: Remove non-existent __copy__(), __deepcopy__(), and
__bases__ from the __dir__() entries of types.GenericAlias.
- gh-134163: Fix a hang when the process is out of memory inside
an exception handler.
- gh-138479: Fix a crash when a generic object’s __typing_subst__
returns an object that isn’t a tuple.
- gh-137576: Fix for incorrect source code being shown in
tracebacks from the Basic REPL when PYTHONSTARTUP is given.
Patch by Adam Hartz.
- gh-132744: Certain calls now check for runaway recursion and
respect the system recursion limit.
- C API
- gh-87135: Attempting to acquire the GIL after runtime
finalization has begun in a different thread now causes the
thread to hang rather than terminate, which avoids potential
crashes or memory corruption caused by attempting to terminate a
thread that is running code not specifically designed to support
termination. In most cases this hanging is harmless since the
process will soon exit anyway.
While not officially marked deprecated until 3.14,
PyThread_exit_thread is no longer called internally and remains
solely for interface compatibility. Its behavior is inconsistent
across platforms, and it can only be used safely in the unlikely
case that every function in the entire call stack has been
designed to support the platform-dependent termination
mechanism. It is recommended that users of this function change
their design to not require thread termination. In the unlikely
case that thread termination is needed and can be done safely,
users may migrate to calling platform-specific APIs such as
pthread_exit (POSIX) or _endthreadex (Windows) directly.
- Build
- gh-135734: Python can correctly be configured and built with
./configure --enable-optimizations --disable-test-modules.
Previously, the profile data generation step failed due to PGO
tests where immortalization couldn’t be properly suppressed.
Patch by Bénédikt Tran.
* Mon Sep 29 2025 daniel.garcia@suse.com
- Add gh139257-Support-docutils-0.22.patch to fix build with latest
docutils (>=0.22) gh#python/cpython#139257
* Mon Sep 22 2025 dimstar@opensuse.org
- Drop AppStream: this results in a different cycle than
appstream-glib. As the appdata.xml is controlled by ourselves, we
can get away with just manually validating it when changing it.
* Thu Sep 18 2025 dimstar@opensuse.org
- Require AppStream to validate appdata file instead of deprecated
appstream-glib.
- Update idle3.appdata.xml to pass the more pedantic appstreamcli.
* Tue Sep 09 2025 daniel.garcia@suse.com
- Add gh138131-exclude-pycache-from-digest.patch fixing reproducible
build for python-nogil.
(bsc#1244680, gh#python/cpython#138131)
* Fri Aug 15 2025 mcepl@cepl.eu
- Update to 3.13.7:
- gh-137583: Fix a deadlock introduced in 3.13.6 when a call
to ssl.SSLSocket.recv was blocked in one thread, and then
another method on the object (such as ssl.SSLSocket.send) was
subsequently called in another thread.
- gh-137044: Return large limit values as positive integers
instead of negative integers in resource.getrlimit().
Accept large values and reject negative values (except
RLIM_INFINITY) for limits in resource.setrlimit().
- gh-136914: Fix retrieval of doctest.DocTest.lineno
for objects decorated with functools.cache() or
functools.cached_property.
- gh-131788: Make ResourceTracker.send from multiprocessing
re-entrant safe
- gh-136155: We are now checking for fatal errors in EPUB
builds in CI.
- gh-137400: Fix a crash in the free threading build when
disabling profiling or tracing across all threads with
PyEval_SetProfileAllThreads() or PyEval_SetTraceAllThreads()
or their Python equivalents threading.settrace_all_threads()
and threading.setprofile_all_threads().
- Remove upstreamed patch:
- gh137583-only-lock-SSL-context.patch