Related Vulnerabilities: CVE-2020-27837  

A security issue was found in gdm before version 3.38.2.1. A race condition in the handling of session shutdown makes it possible to bypass the lock screen for a user that has autologin enabled, accessing their session without authentication. This is similar to CVE-2017-12164, but requires more difficult conditions to exploit.

Severity Low

Remote No

Type Authentication bypass

Description

A security issue was found in gdm before version 3.38.2.1. A race condition in the handling of session shutdown makes it possible to bypass the lock screen for a user that has autologin enabled, accessing their session without authentication. This is similar to CVE-2017-12164, but requires more difficult conditions to exploit.

AVG-1380 gdm 3.38.2-1 3.38.2.1-1 Low Fixed

https://bugzilla.redhat.com/show_bug.cgi?id=1906812
https://gitlab.gnome.org/GNOME/gdm/-/issues/660
https://gitlab.gnome.org/GNOME/gdm/-/commit/9b6d9b24a5f69674447c7bc9aacfab0988b914bd