On October 19, 2016, a privilege escalation vulnerability in the Linux kernel was disclosed. The bug is nicknamed Dirty COW because the underlying issue was a race condition in the way kernel handles copy-on-write (COW). Dirty COW has existed for a long time — at least since 2007, with kernel version 2.6.22 — so the vast majority of servers are at risk.

Reliable Penguin is in the process of upgrading all customer servers with the appropriate kernel updates. You can read more about the vulnerability here:

http://blogs.reliablepenguin.com/2016/10/27/dirty-cow-vulnerability-cve-2016-5195

and here:

https://dirtycow.ninja/

Contact Reliable Penguin support if you have questions or need assistance.