The "Dirty COW" privilege escalation vulnerability in the Linux kernel, as reported in CVE-2016-5195, has been patched in CoreOS Linux. The update is currently rolling out to the Alpha (1192.2.0), Beta (1185.2.0) and Stable (1122.3.0) channels. If automatic updates are enabled (default configuration), your server should be patched within the next several hours (if it hasn’t already received the update).
If automatic updates are disabled, you can force an update by running
If you have any questions or concerns, please join us in IRC freenode/#coreos.