SUSE SLED15: MozillaFirefox / MozillaFirefox-branding-upstream / etc (SUSE-SU-2026:1126-1)

critical Nessus Plugin ID 350280

Synopsis

The remote SUSE host is missing one or more security updates.

Description

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:1126-1 advisory.

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

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

Plugin Details

Severity: Critical

ID: 350280

File Name: suse_SU-2026-1126-1.nasl

Version: 1.1

Type: Local

Agent: unix

Family: SuSE Local Security Checks

Published: 9/25/2026

Updated: 9/25/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.6

Percentile: 98.3

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2026-4717

CVSS v3

Risk Factor: Critical

Base Score: 10

Temporal Score: 8.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS Score Source: CVE-2026-4692

Vulnerability Information

CPE: cpe:/o:novell:suse_linux:15, p-cpe:/a:novell:suse_linux:mozillafirefox-devel, p-cpe:/a:novell:suse_linux:mozillafirefox-translations-common, p-cpe:/a:novell:suse_linux:mozillafirefox-translations-other, p-cpe:/a:novell:suse_linux:mozillafirefox

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/SuSE/release, Host/SuSE/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 3/27/2026

Vulnerability Publication Date: 3/4/2026

Reference Information

CVE: CVE-2025-59375, CVE-2026-4684, CVE-2026-4685, CVE-2026-4686, CVE-2026-4687, CVE-2026-4688, CVE-2026-4689, CVE-2026-4690, CVE-2026-4691, CVE-2026-4692, CVE-2026-4693, CVE-2026-4694, CVE-2026-4695, CVE-2026-4696, CVE-2026-4697, CVE-2026-4698, CVE-2026-4699, CVE-2026-4700, CVE-2026-4701, CVE-2026-4702, CVE-2026-4704, CVE-2026-4705, CVE-2026-4706, CVE-2026-4707, CVE-2026-4708, CVE-2026-4709, CVE-2026-4710, CVE-2026-4711, CVE-2026-4712, CVE-2026-4713, CVE-2026-4714, CVE-2026-4715, CVE-2026-4716, CVE-2026-4717, CVE-2026-4718, CVE-2026-4719, CVE-2026-4720, CVE-2026-4721

SuSE: SUSE-SU-2026:1126-1

Detections

Analytics