CVE-2020-27837

MediumCVSS 6.4/10Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 3.1 6.4/10CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-362

Affected software

Vendor	Product	Versions
n/a	gdm	prior to 3.38.2.1

References

https://bugzilla.redhat.com/show_bug.cgi?id=1906812Issue Tracking, Patch, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1906812Issue Tracking, Patch, Third Party Advisory

Timeline

Published: Dec 28, 2020
Last modified: Jun 17, 2026
NVD status: Modified

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