SUSE SLES12 Security Update : MozillaFirefox (SUSE-SU-2026:2039-1)

critical Nessus Plugin ID 316766

Synopsis

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

Description

The remote SUSE Linux SLES12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:2039-1 advisory.

This update for MozillaFirefox fixes the following issue

Update to Firefox Extended Support Release 140.11.0 ESR MFSA 2026-48 (bsc#1265212)

- CVE-2026-8388: Incorrect boundary conditions in the JavaScript Engine: JIT component.
- CVE-2026-8391: Other issue in the JavaScript Engine component.
- CVE-2026-8401: Sandbox escape in the Profile Backup component.
- CVE-2026-8946: Incorrect boundary conditions in the Audio/Video: Web Codecs component.
- CVE-2026-8947: Use-after-free in the DOM: Bindings (WebIDL) component.
- CVE-2026-8949: Integer overflow in the Widget: Win32 component.
- CVE-2026-8950: Same-origin policy bypass in the Networking: HTTP component.
- CVE-2026-8953: Sandbox escape due to use-after-free in the Disability Access APIs component.
- CVE-2026-8954: Incorrect boundary conditions, integer overflow in the Audio/Video component.
- CVE-2026-8955: Privilege escalation in the DOM: Workers component.
- CVE-2026-8956: Integer overflow in the Networking: JAR component.
- CVE-2026-8957: Privilege escalation in the Enterprise Policies component.
- CVE-2026-8958: Information disclosure, sandbox escape in the Security: Process Sandboxing component.
- CVE-2026-8959: Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component.
- CVE-2026-8961: Spoofing issue in the Form Autofill component.
- CVE-2026-8962: Mitigation bypass in the DOM: Security component.
- CVE-2026-8968: Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component.
- CVE-2026-8970: Privilege escalation in the Security component.
- CVE-2026-8974: Memory safety bugs fixed in Firefox ESR 140.11 and Firefox 151.
- CVE-2026-8975: Memory safety bugs fixed in Firefox ESR 115.36, Firefox ESR 140.11 and Firefox 151.

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 MozillaFirefox, MozillaFirefox-devel and / or MozillaFirefox-translations-common packages.

Plugin Details

Severity: Critical

ID: 316766

File Name: suse_SU-2026-2039-1.nasl

Version: 1.1

Type: Local

Agent: unix

Family: SuSE Local Security Checks

Published: 5/26/2026

Updated: 5/26/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: High

Score: 8.1

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-2026-8975

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

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

CVSS Score Source: CVE-2026-8956

Vulnerability Information

CPE: cpe:/o:novell:suse_linux:12, p-cpe:/a:novell:suse_linux:mozillafirefox-devel, p-cpe:/a:novell:suse_linux:mozillafirefox-translations-common, 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: 5/21/2026

Vulnerability Publication Date: 5/12/2026

Reference Information

CVE: CVE-2026-8388, CVE-2026-8391, CVE-2026-8401, CVE-2026-8946, CVE-2026-8947, CVE-2026-8949, CVE-2026-8950, CVE-2026-8953, CVE-2026-8954, CVE-2026-8955, CVE-2026-8956, CVE-2026-8957, CVE-2026-8958, CVE-2026-8959, CVE-2026-8961, CVE-2026-8962, CVE-2026-8968, CVE-2026-8970, CVE-2026-8974, CVE-2026-8975

SuSE: SUSE-SU-2026:2039-1

Detections

Analytics