CVE-2019-5736 Runc and Docker vulnerability remediation
Scheduled for May 1, 09:00 - 15:00 UTC
SRE needs to apply pending security updates, especially runc and docker:

This will Apply update security updates and reboot hosts.
Posted 7 days ago. Apr 17, 2019 - 07:57 UTC
This scheduled maintenance affects: starter-us-east-1b (Master API Service, Application Creation Service, Docker Registry Service, etcd Service).