CVE catalog

CVE-2021-20315

gnome-shell: CVE-2021-20315

Severity: Low
Published: Feb 18, 2022, 6:15:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.20% · Oct 25, 2026

A locking protection bypass flaw was found in some versions of gnome-shell as shipped within CentOS Stream 8, when the "Application menu" or "Window list" GNOME extensions are enabled. This flaw allows a physical attacker who has access to a locked system to kill existing applications and start new ones as the locked user, even if the session is still locked.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	gnome-shell	sid	`51.0-3`	not affected
Debian	gnome-shell	forky	`50.5-1`	not affected
Debian	gnome-shell	trixie	`48.7-0+deb13u2`	not affected
Debian	gnome-shell	bookworm	`43.9-0+deb12u2`	not affected
Debian	gnome-shell	bookworm-security	`43.9-0+deb12u2`	not affected

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	gnome-shell	source	sid	`Not affected`	unimportant	Not reported	Not reported
Debian	gnome-shell	source	forky	`Not affected`	unimportant	Not reported	Not reported
Debian	gnome-shell	source	trixie	`Not affected`	unimportant	Not reported	Not reported
Debian	gnome-shell	source	bookworm	`Not affected`	unimportant	Not reported	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[gnome-shell]Not affected
Details (4)
- 43.9-0+deb12u2 · amd64 · bookworm
  Not affected
  dsa · gnome-shell · debian · bookworm
- 43.9-0+deb12u2 · arm64 · bookworm
  Not affected
  dsa · gnome-shell · debian · bookworm
- 43.9-0+deb12u2 · amd64 · bookworm-security
  Not affected
  dsa · gnome-shell · debian · bookworm
- 43.9-0+deb12u2 · arm64 · bookworm-security
  Not affected
  dsa · gnome-shell · debian · bookworm
[gnome-shell-common]Not affected
Source package: [gnome-shell]
Details (4)
- 43.9-0+deb12u2 · all · bookworm
  Not affected
  dsa · gnome-shell · debian · bookworm
- 43.9-0+deb12u2 · all · bookworm
  Not affected
  dsa · gnome-shell · debian · bookworm
- 43.9-0+deb12u2 · all · bookworm-security
  Not affected
  dsa · gnome-shell · debian · bookworm
- 43.9-0+deb12u2 · all · bookworm-security
  Not affected
  dsa · gnome-shell · debian · bookworm
[gnome-shell-extension-prefs]Not affected
Source package: [gnome-shell]
Details (4)
- 43.9-0+deb12u2 · amd64 · bookworm
  Not affected
  dsa · gnome-shell · debian · bookworm
- 43.9-0+deb12u2 · arm64 · bookworm
  Not affected
  dsa · gnome-shell · debian · bookworm
- 43.9-0+deb12u2 · amd64 · bookworm-security
  Not affected
  dsa · gnome-shell · debian · bookworm
- 43.9-0+deb12u2 · arm64 · bookworm-security
  Not affected
  dsa · gnome-shell · debian · bookworm

Observed: Oct 23, 2026, 5:54:20 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database]