openSUSE-SU-2026:21594-1: moderate: Security update for MozillaFirefox

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Newsgroups gmane.linux.suse.security.announce
Message-ID <[email protected]> 
openSUSE security update: security update for mozillafirefox
-------------------------------------------------------------

Announcement ID: openSUSE-SU-2026:21594-1
Rating: moderate
References:

  * bsc#1274867



Cross-References:

  * CVE-2026-74934
  * CVE-2026-74935
  * CVE-2026-74936
  * CVE-2026-74939
  * CVE-2026-74940
  * CVE-2026-74941
  * CVE-2026-74942
  * CVE-2026-74943
  * CVE-2026-74944
  * CVE-2026-74945
  * CVE-2026-74946
  * CVE-2026-74948
  * CVE-2026-74949
  * CVE-2026-74953
  * CVE-2026-74957
  * CVE-2026-74959
  * CVE-2026-74960
  * CVE-2026-74962
  * CVE-2026-74963
  * CVE-2026-74964
  * CVE-2026-74965
  * CVE-2026-74967
  * CVE-2026-74969
  * CVE-2026-74971
  * CVE-2026-74972
  * CVE-2026-74973
  * CVE-2026-74974
  * CVE-2026-74976
  * CVE-2026-74983
  * CVE-2026-74987
  * CVE-2026-74990



CVSS scores:

  * CVE-2026-74934 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
  * CVE-2026-74935 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
  * CVE-2026-74936 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
  * CVE-2026-74963 ( SUSE ): 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
  * CVE-2026-74990 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected Products:

         openSUSE Leap 16.0

-------------------------------------------------------------

An update that solves 31 vulnerabilities and has one bug fix can now be installed.

Description:

This update for MozillaFirefox fixes the following issues:

Update to Firefox Extended Support Release 140.14.0 ESR.

- MFSA 2026-76 (bsc#1274867)
  * CVE-2026-74934: Site isolation issue in the Graphics: CanvasWebGL component
  * CVE-2026-74935: Privilege escalation in the DOM: Networking component
  * CVE-2026-74936: Use-after-free in the JavaScript: WebAssembly component
  * CVE-2026-74939: Privilege escalation in the DOM: Navigation component
  * CVE-2026-74940: Use-after-free in the Graphics: Text component
  * CVE-2026-74941: Privilege escalation in the Graphics: CanvasWebGL component
  * CVE-2026-74942: Privilege escalation in the Remote Settings Client component
  * CVE-2026-74943: Use-after-free in the Graphics: ImageLib component
  * CVE-2026-74944: Use-after-free in the DOM: Core & HTML component
  * CVE-2026-74945: Information disclosure in the Graphics: Text component
  * CVE-2026-74946: Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component
  * CVE-2026-74948: Information disclosure in the Graphics component
  * CVE-2026-74949: Privilege escalation due to use-after-free in the Graphics:Canvas2D component
  * CVE-2026-74953: Privilege escalation in the Networking: Cookies component
  * CVE-2026-74957: Mitigation bypass in the Safe Browsing component
  * CVE-2026-74959: Mitigation bypass in the Storage: Cache API component
  * CVE-2026-74960: Site isolation issue in the WebExtensions component
  * CVE-2026-74962: Site isolation issue in the Networking: Cookies component
  * CVE-2026-74963: Same-origin policy bypass in the Networking: Cookies component
  * CVE-2026-74964: Integer overflow in the Graphics component
  * CVE-2026-74965: Privilege escalation in the Shell Integration component
  * CVE-2026-74967: Same-origin policy bypass in the Audio/Video: Playback component
  * CVE-2026-74969: Use-after-free in the Layout: Text and Fonts component
  * CVE-2026-74971: Information disclosure in the DOM: UI Events & Focus Handling component
  * CVE-2026-74972: Information disclosure in the DOM: Push Subscriptions component
  * CVE-2026-74973: Race condition, use-after-free in the Graphics component
  * CVE-2026-74974: Same-origin policy bypass in the Graphics: ImageLib component
  * CVE-2026-74976: JIT miscompilation in the JavaScript Engine: JIT component
  * CVE-2026-74983: Mitigation bypass in the Data Loss Prevention component
  * CVE-2026-74987: Internally found bugs fixed in Firefox ESR 140.14, Firefox ESR 153.1 and Firefox 154
  * CVE-2026-74990: Internally found bugs fixed in Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1 and
    Firefox 154


Patch instructions:

   To install this openSUSE security update use the suse recommended installation methods
   like YaST online_update or "zypper patch".
   Alternatively you can run the command listed for your product:

- openSUSE Leap 16.0

   zypper in -t patch openSUSE-Leap-16.0-1464=1

Package List:

- openSUSE Leap 16.0:

  MozillaFirefox-140.14.0-160000.1.1
  MozillaFirefox-branding-upstream-140.14.0-160000.1.1
  MozillaFirefox-devel-140.14.0-160000.1.1
  MozillaFirefox-translations-common-140.14.0-160000.1.1
  MozillaFirefox-translations-other-140.14.0-160000.1.1

References:

  * https://www.suse.com/security/cve/CVE-2026-74934.html
  * https://www.suse.com/security/cve/CVE-2026-74935.html
  * https://www.suse.com/security/cve/CVE-2026-74936.html
  * https://www.suse.com/security/cve/CVE-2026-74939.html
  * https://www.suse.com/security/cve/CVE-2026-74940.html
  * https://www.suse.com/security/cve/CVE-2026-74941.html
  * https://www.suse.com/security/cve/CVE-2026-74942.html
  * https://www.suse.com/security/cve/CVE-2026-74943.html
  * https://www.suse.com/security/cve/CVE-2026-74944.html
  * https://www.suse.com/security/cve/CVE-2026-74945.html
  * https://www.suse.com/security/cve/CVE-2026-74946.html
  * https://www.suse.com/security/cve/CVE-2026-74948.html
  * https://www.suse.com/security/cve/CVE-2026-74949.html
  * https://www.suse.com/security/cve/CVE-2026-74953.html
  * https://www.suse.com/security/cve/CVE-2026-74957.html
  * https://www.suse.com/security/cve/CVE-2026-74959.html
  * https://www.suse.com/security/cve/CVE-2026-74960.html
  * https://www.suse.com/security/cve/CVE-2026-74962.html
  * https://www.suse.com/security/cve/CVE-2026-74963.html
  * https://www.suse.com/security/cve/CVE-2026-74964.html
  * https://www.suse.com/security/cve/CVE-2026-74965.html
  * https://www.suse.com/security/cve/CVE-2026-74967.html
  * https://www.suse.com/security/cve/CVE-2026-74969.html
  * https://www.suse.com/security/cve/CVE-2026-74971.html
  * https://www.suse.com/security/cve/CVE-2026-74972.html
  * https://www.suse.com/security/cve/CVE-2026-74973.html
  * https://www.suse.com/security/cve/CVE-2026-74974.html
  * https://www.suse.com/security/cve/CVE-2026-74976.html
  * https://www.suse.com/security/cve/CVE-2026-74983.html
  * https://www.suse.com/security/cve/CVE-2026-74987.html
  * https://www.suse.com/security/cve/CVE-2026-74990.html
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