CVE-2020-27837

6.4 mediumEPSS 0.2%

Medium (6.4) in gnome gnome display manager. EPSS 0.2% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

6.4 medium

CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.2% chance of exploitation in the next 30 days; higher than 13% of CVEs (scores of 2026-10-31)
CWE: CWE-362
Published: 2020-12-28
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

gnome:gnome_display_manager

References

https://bugzilla.redhat.com/show_bug.cgi?id=1906812
https://bugzilla.redhat.com/show_bug.cgi?id=1906812

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