There are a couple of privilege escalation vulnerabilities that have recently been posted on the SANS Internet Storm Centre site. If you run LINUX it's worth taking a look as in theory these may cause you pain regardless of your distro and package choices.
I don't claim to be a LINUX guru though I take reports to respected sources as worthy of closer inspection. If you know more about the impact / painless mitigation steps then please share them.
Thanks to the "LINUX Security site" for raising awareness of these issues.
This issue has been addressed with the 18.104.22.168 kernel release
Fast fix none of this wait a month for the patch to become available