🛡️ openSUSE-SU-2026:20439-1 — mozillafirefox

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Security update for MozillaFirefox

This update for MozillaFirefox fixes the following issues:

Update to Firefox 140.9.0 ESR (MFSA 2026-22, bsc#1260083):

  • CVE-2026-4684: Race condition, use-after-free in the Graphics: WebRender component
  • CVE-2026-4685: Incorrect boundary conditions in the Graphics: Canvas2D component
  • CVE-2026-4686: Incorrect boundary conditions in the Graphics: Canvas2D component
  • CVE-2026-4687: Sandbox escape due to incorrect boundary conditions in the Telemetry component
  • CVE-2026-4688: Sandbox escape due to use-after-free in the Disability Access APIs component
  • CVE-2026-4689: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component
  • CVE-2026-4690: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component
  • CVE-2026-4691: Use-after-free in the CSS Parsing and Computation component
  • CVE-2026-4692: Sandbox escape in the Responsive Design Mode component
  • CVE-2026-4693: Incorrect boundary conditions in the Audio/Video: Playback component
  • CVE-2026-4694: Incorrect boundary conditions, integer overflow in the Graphics component
  • CVE-2026-4695: Incorrect boundary conditions in the Audio/Video: Web Codecs component
  • CVE-2026-4696: Use-after-free in the Layout: Text and Fonts component
  • CVE-2026-4697: Incorrect boundary conditions in the Audio/Video: Web Codecs component
  • CVE-2026-4698: JIT miscompilation in the JavaScript Engine: JIT component
  • CVE-2026-4699: Incorrect boundary conditions in the Layout: Text and Fonts component
  • CVE-2026-4700: Mitigation bypass in the Networking: HTTP component
  • CVE-2026-4701: Use-after-free in the JavaScript Engine component
  • CVE-2026-4702: JIT miscompilation in the JavaScript Engine component
  • CVE-2026-4704: Denial-of-service in the WebRTC: Signaling component
  • CVE-2026-4705: Undefined behavior in the WebRTC: Signaling component
  • CVE-2026-4706: Incorrect boundary conditions in the Graphics: Canvas2D component
  • CVE-2026-4707: Incorrect boundary conditions in the Graphics: Canvas2D component
  • CVE-2026-4708: Incorrect boundary conditions in the Graphics component
  • CVE-2026-4709: Incorrect boundary conditions in the Audio/Video: GMP component
  • CVE-2026-4710: Incorrect boundary conditions in the Audio/Video component
  • CVE-2026-4711: Use-after-free in the Widget: Cocoa component
  • CVE-2026-4712: Information disclosure in the Widget: Cocoa component
  • CVE-2026-4713: Incorrect boundary conditions in the Graphics component
  • CVE-2026-4714: Incorrect boundary conditions in the Audio/Video component
  • CVE-2026-4715: Uninitialized memory in the Graphics: Canvas2D component
  • CVE-2026-4716: Incorrect boundary conditions, uninitialized memory in the JavaScript Engine component
  • CVE-2026-4717: Privilege escalation in the Netmonitor component
  • CVE-2025-59375: Denial-of-service in the XML component
  • CVE-2026-4718: Undefined behavior in the WebRTC: Signaling component
  • CVE-2026-4719: Incorrect boundary conditions in the Graphics: Text component
  • CVE-2026-4720: Memory safety bugs fixed in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and

Thunderbird 149

  • CVE-2026-4721: Memory safety bugs fixed in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9,

Firefox 149 and Thunderbird 149

Affected software

openSUSE-SU-2026:20439-1 is recorded against 1 package.

  • mozillafirefox (fixed in 140.9.0-160000.1.1)

Timeline and source

Published on 27 March 2026 and last revised on 3 April 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

bugzilla.suse.com (Report)
www.suse.com (Web)
www.suse.com (Web)
www.suse.com (Web)
www.suse.com (Web)
www.suse.com (Web)
www.suse.com (Web)
www.suse.com (Web)
www.suse.com (Web)
www.suse.com (Web)
www.suse.com (Web)
www.suse.com (Web)
www.suse.com (Web)
www.suse.com (Web)
www.suse.com (Web)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector N/A
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2026-03-27
Updated 2026-08-12
Modified 2026-04-03
Fix URL N/A

Affected Packages

Software From version Fixed in
mozillafirefox — 140.9.0-160000.1.1

References

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