CVE-2016-5195 - Kernel local privilege escalation (exploited)
Just noticed this:
Looks like anyone with local access can get root. Exploits are in the wild.
Upon further checking, doesn't look like this can be used to break out of an OpenVZ container or KVM guest as access to host's /proc/self/mem is required. However, anyone within a shared hosting setup (cPanel etc) could be affected.
Mitigation (not ideal, but works):