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SUSE SLES12 Security Update : MozillaFirefox (SUSE-SU-2026:0122-1)

high Nessus Plugin ID 284809

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-2026:0122-1 advisory.

 Update to Firefox Extended Support Release 140.7.0 ESR (bsc#1256340).

 - MFSA 2026-03
 * CVE-2026-0877: Mitigation bypass in the DOM: Security component
 * CVE-2026-0878: Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL component
 * CVE-2026-0879: Sandbox escape due to incorrect boundary conditions in the Graphics component
 * CVE-2026-0880: Sandbox escape due to integer overflow in the Graphics component
 * CVE-2026-0882: Use-after-free in the IPC component
 * CVE-2025-14327: Spoofing issue in the Downloads Panel component
 * CVE-2026-0883: Information disclosure in the Networking component
 * CVE-2026-0884: Use-after-free in the JavaScript Engine component
 * CVE-2026-0885: Use-after-free in the JavaScript: GC component
 * CVE-2026-0886: Incorrect boundary conditions in the Graphics component
 * CVE-2026-0887: Clickjacking issue, information disclosure in the PDF Viewer component
 * CVE-2026-0890: Spoofing issue in the DOM: Copy-Paste and Drag-Drop component
 * CVE-2026-0891: Memory safety bugs fixed in Firefox ESR 140.7, Thunderbird ESR 140.7, Firefox 147 and Thunderbird 147

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.

See Also

https://bugzilla.suse.com/1256340

http://www.nessus.org/u?1a061d7c

https://www.suse.com/security/cve/CVE-2025-14327

https://www.suse.com/security/cve/CVE-2026-0877

https://www.suse.com/security/cve/CVE-2026-0878

https://www.suse.com/security/cve/CVE-2026-0879

https://www.suse.com/security/cve/CVE-2026-0880

https://www.suse.com/security/cve/CVE-2026-0882

https://www.suse.com/security/cve/CVE-2026-0883

https://www.suse.com/security/cve/CVE-2026-0884

https://www.suse.com/security/cve/CVE-2026-0885

https://www.suse.com/security/cve/CVE-2026-0886

https://www.suse.com/security/cve/CVE-2026-0887

https://www.suse.com/security/cve/CVE-2026-0890

https://www.suse.com/security/cve/CVE-2026-0891

Plugin Details

Severity: High

ID: 284809

File Name: suse_SU-2026-0122-1.nasl

Version: 1.1

Type: local

Agent: unix

Published: 1/15/2026

Updated: 1/15/2026

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

Risk Information

VPR

Risk Factor: High

Score: 7.9

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2025-14327

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

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: 1/14/2026

Vulnerability Publication Date: 12/9/2025

Reference Information

CVE: CVE-2025-14327, CVE-2026-0877, CVE-2026-0878, CVE-2026-0879, CVE-2026-0880, CVE-2026-0882, CVE-2026-0883, CVE-2026-0884, CVE-2026-0885, CVE-2026-0886, CVE-2026-0887, CVE-2026-0890, CVE-2026-0891

SuSE: SUSE-SU-2026:0122-1