Security update for MozillaFirefox

Announcement ID:	SUSE-SU-2026:21383-1
Release Date:	2026-04-23T14:47:03Z
Rating:	important
References:	bsc#1262230
Cross-References:	CVE-2026-6746 CVE-2026-6747 CVE-2026-6748 CVE-2026-6749 CVE-2026-6750 CVE-2026-6751 CVE-2026-6752 CVE-2026-6753 CVE-2026-6754 CVE-2026-6757 CVE-2026-6759 CVE-2026-6761 CVE-2026-6762 CVE-2026-6763 CVE-2026-6764 CVE-2026-6765 CVE-2026-6766 CVE-2026-6767 CVE-2026-6769 CVE-2026-6770 CVE-2026-6771 CVE-2026-6772 CVE-2026-6776 CVE-2026-6785 CVE-2026-6786
CVSS scores:	CVE-2026-6746 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVE-2026-6747 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVE-2026-6748 ( NVD ): 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVE-2026-6749 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVE-2026-6750 ( NVD ): 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVE-2026-6751 ( NVD ): 7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L CVE-2026-6752 ( NVD ): 7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L CVE-2026-6753 ( NVD ): 7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L CVE-2026-6754 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVE-2026-6757 ( NVD ): 6.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L CVE-2026-6759 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVE-2026-6761 ( NVD ): 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVE-2026-6762 ( NVD ): 6.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L CVE-2026-6763 ( NVD ): 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N CVE-2026-6764 ( NVD ): 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L CVE-2026-6765 ( NVD ): 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N CVE-2026-6766 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVE-2026-6767 ( NVD ): 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N CVE-2026-6769 ( NVD ): 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVE-2026-6770 ( NVD ): 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L CVE-2026-6771 ( NVD ): 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVE-2026-6772 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVE-2026-6776 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVE-2026-6785 ( NVD ): 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVE-2026-6786 ( NVD ): 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products:	SUSE Linux Enterprise Server 16.0 SUSE Linux Enterprise Server for SAP applications 16.0

An update that solves 25 vulnerabilities can now be installed.

Description:

This update for MozillaFirefox fixes the following issues:

Update to Firefox Extended Support Release 140.10.0 ESR.

• MFSA 2026-32 (bsc#1262230):
• CVE-2026-6746: Use-after-free in the DOM: Core & HTML component
• CVE-2026-6747: Use-after-free in the WebRTC component
• CVE-2026-6748: Uninitialized memory in the Audio/Video: Web Codecs component
• CVE-2026-6749: Information disclosure due to uninitialized memory in the Graphics: Canvas2D component
• CVE-2026-6750: Privilege escalation in the Graphics: WebRender component
• CVE-2026-6751: Uninitialized memory in the Audio/Video: Web Codecs component
• CVE-2026-6752: Incorrect boundary conditions in the WebRTC component
• CVE-2026-6753: Incorrect boundary conditions in the WebRTC component
• CVE-2026-6754: Use-after-free in the JavaScript Engine component
• CVE-2026-6757: Invalid pointer in the JavaScript: WebAssembly component
• CVE-2026-6759: Use-after-free in the Widget: Cocoa component
• CVE-2026-6761: Privilege escalation in the Networking component
• CVE-2026-6762: Spoofing issue in the DOM: Core & HTML component
• CVE-2026-6763: Mitigation bypass in the File Handling component
• CVE-2026-6764: Incorrect boundary conditions in the DOM: Device Interfaces component
• CVE-2026-6765: Information disclosure in the Form Autofill component
• CVE-2026-6766: Incorrect boundary conditions in the Libraries component in NSS
• CVE-2026-6767: Other issue in the Libraries component in NSS
• CVE-2026-6769: Privilege escalation in the Debugger component
• CVE-2026-6770: Other issue in the Storage: IndexedDB component
• CVE-2026-6771: Mitigation bypass in the DOM: Security component
• CVE-2026-6772: Incorrect boundary conditions in the Libraries component in NSS
• CVE-2026-6776: Incorrect boundary conditions in the WebRTC: Networking component
• CVE-2026-6785: Memory safety bugs fixed in Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150
• CVE-2026-6786: Memory safety bugs fixed in Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150

Patch Instructions:

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

• SUSE Linux Enterprise Server for SAP applications 16.0
  zypper in -t patch SUSE-SLES-16.0-635=1
• SUSE Linux Enterprise Server 16.0
  zypper in -t patch SUSE-SLES-16.0-635=1

Package List:

• SUSE Linux Enterprise Server for SAP applications 16.0 (ppc64le x86_64)
  • MozillaFirefox-debuginfo-140.10.0-160000.1.1
  • MozillaFirefox-translations-common-140.10.0-160000.1.1
  • MozillaFirefox-140.10.0-160000.1.1
  • MozillaFirefox-translations-other-140.10.0-160000.1.1
  • MozillaFirefox-debugsource-140.10.0-160000.1.1
• SUSE Linux Enterprise Server for SAP applications 16.0 (noarch)
  • MozillaFirefox-devel-140.10.0-160000.1.1
• SUSE Linux Enterprise Server 16.0 (aarch64 ppc64le s390x x86_64)
  • MozillaFirefox-debuginfo-140.10.0-160000.1.1
  • MozillaFirefox-translations-common-140.10.0-160000.1.1
  • MozillaFirefox-140.10.0-160000.1.1
  • MozillaFirefox-translations-other-140.10.0-160000.1.1
  • MozillaFirefox-debugsource-140.10.0-160000.1.1
• SUSE Linux Enterprise Server 16.0 (noarch)
  • MozillaFirefox-devel-140.10.0-160000.1.1

References:

• https://www.suse.com/security/cve/CVE-2026-6746.html
• https://www.suse.com/security/cve/CVE-2026-6747.html
• https://www.suse.com/security/cve/CVE-2026-6748.html
• https://www.suse.com/security/cve/CVE-2026-6749.html
• https://www.suse.com/security/cve/CVE-2026-6750.html
• https://www.suse.com/security/cve/CVE-2026-6751.html
• https://www.suse.com/security/cve/CVE-2026-6752.html
• https://www.suse.com/security/cve/CVE-2026-6753.html
• https://www.suse.com/security/cve/CVE-2026-6754.html
• https://www.suse.com/security/cve/CVE-2026-6757.html
• https://www.suse.com/security/cve/CVE-2026-6759.html
• https://www.suse.com/security/cve/CVE-2026-6761.html
• https://www.suse.com/security/cve/CVE-2026-6762.html
• https://www.suse.com/security/cve/CVE-2026-6763.html
• https://www.suse.com/security/cve/CVE-2026-6764.html
• https://www.suse.com/security/cve/CVE-2026-6765.html
• https://www.suse.com/security/cve/CVE-2026-6766.html
• https://www.suse.com/security/cve/CVE-2026-6767.html
• https://www.suse.com/security/cve/CVE-2026-6769.html
• https://www.suse.com/security/cve/CVE-2026-6770.html
• https://www.suse.com/security/cve/CVE-2026-6771.html
• https://www.suse.com/security/cve/CVE-2026-6772.html
• https://www.suse.com/security/cve/CVE-2026-6776.html
• https://www.suse.com/security/cve/CVE-2026-6785.html
• https://www.suse.com/security/cve/CVE-2026-6786.html
• https://bugzilla.suse.com/show_bug.cgi?id=1262230