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CVE-2020-27837

MEDIUM
6.4
CVSS Score
Published: December 28, 2020 at 06:34 PM UTC
Updated: June 17, 2026 at 03:09 AM UTC
1 product affected across 1 vendorGnome Display Manager

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Severity
MEDIUM6.4
Exploit prediction
EPSS 0.2%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Gnome Display Manager· Gnome
95%
v < 3.38.2.1
Affected range stops below 3.38.2.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

x_refsource_MISCIssue TrackingPatchThird Party Advisory
Source: [email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=1906812

CVSS

6.4MEDIUM[email protected]
Attack Vector
PHYSICAL
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-362

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