A flaw was found in GDM in versions prior to 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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade gdm3 | Jul 30, 2024 | Dec 28, 2020 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Dec 28, 2020 |
| Suse | — | Upgrade libgdm1Upgrade gdmUpgrade gdm-schemaUpgrade gdm-langUpgrade typelib-1_0-Gdm-1_0Upgrade gdm-develUpgrade gdm-systemdUpgrade gdmflexiserver | Aug 9, 2024 | Dec 28, 2020 |
| Ubuntu | — | No solution exists | Jun 26, 2025 | Dec 28, 2020 |
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