This update for lxc, lxcfs to version 3.1.0 fixes the following issues:

Security issues fixed:

- CVE-2019-5736: Fixed a container breakout vulnerability (boo#1122185).
- CVE-2018-6556: Enable setuid bit on lxc-user-nic (boo#988348).

Non-security issues fixed:

- Update to LXC 3.1.0. The changelog is far too long to include here, please
  look at https://linuxcontainers.org/. (boo#1131762)