[username90]

The internal OS distribution team is a security team. They ensure that the OS everyone at Google works on and run their code on is secure.

[qaq]

They report to CSO ? Would be pretty unusual again not a googler but normally that would not be part of security team

[username90]

Google has a lot of security teams since they do all of their infra themselves. The people who push security patches to peoples OS's is a security team, and they used that channel to push a message similar to this.