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SUSE 16.0 MozillaFirefox Important Security Issues Fixed 2026-21383-1

suse
Calendar Grey April 28, 2026
Dist Suse Esm H88
Critical update for MozillaFirefox on SUSE addresses 25 issues including privilege escalation and memory safety.
An update that solves 25 vulnerabilities can now be installed.

Summary

## 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

Topics%20covered

Topics Covered

security advisory SuSE privilege escalation important web security MozillaFirefox

References

* bsc#1262230

Cross-

* 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

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:21383-1
Release Date: 2026-04-23T14:47:03Z
Rating: important

Topics%20covered

Topics Covered

security advisory SuSE privilege escalation important web security MozillaFirefox

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