https://wccftech.com/google-december-security-bulletin/

Google’s Android security bulletin for December is finally out, and it means that the currently supported lineup of Pixel and Nexus phone should be getting new builds tomorrow. The security bulletin has been released a day ahead to detail what Google has fixed in the new version of builds.

The Android security bulletin is different from Pixel/Nexus bulletin as it talks about security patches done in Android patch level rather than just Google devices. In the bulletin released today, Google notes that it has resolved 19 issues in the patch 2017-12-01 and 28 issues in the patch dated 2017-12-05.