Given the severity of the Dirty Cow vulnerability and variants that are and are not effective against different variants of RedHat Enterprise Linux, which we use, all servers are undergoing a proactive kernel upgrade this afternoon. Expect a < 5 minute outage for newer generation servers (v6+) and a 10-15 minute outage for older generation (pre v6) servers. Luna has already been upgraded, so no further action will be taken on Luna.
3:38 PM EDT - maintenance window concluded