Update LXC to the latest stable version. See [here](https://linuxcontainers.org/lxc/news/) for the list of changes.
[ 1 ] Bug #1398242 - CVE-2016-8649 lxc: lxc-attach to malicious container allows access to host
https://bugzilla.redhat.com/show_bug.cgi?id=1398242
This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade lxc' at the command line. For more information, refer to the dnf documentation available at https://dnf.readthedocs.io/en/latest/command_ref.html
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