SUSE SLES12 Security Update : MozillaFirefox (SUSE-SU-2026:0812-1)

critical Nessus Plugin ID 301305

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-2026:0812-1 advisory.

Update to Firefox Extended Support Release 140.8.0 ESR (MFSA 2026-15) (bsc#1258568):

- CVE-2026-2757: Incorrect boundary conditions in the WebRTC: Audio/Video component
- CVE-2026-2758: Use-after-free in the JavaScript: GC component
- CVE-2026-2759: Incorrect boundary conditions in the Graphics: ImageLib component
- CVE-2026-2760: Sandbox escape due to incorrect boundary conditions in the Graphics: WebRender component
- CVE-2026-2761: Sandbox escape in the Graphics: WebRender component
- CVE-2026-2762: Integer overflow in the JavaScript: Standard Library component
- CVE-2026-2763: Use-after-free in the JavaScript Engine component
- CVE-2026-2764: JIT miscompilation, use-after-free in the JavaScript Engine: JIT component
- CVE-2026-2765: Use-after-free in the JavaScript Engine component
- CVE-2026-2766: Use-after-free in the JavaScript Engine: JIT component
- CVE-2026-2767: Use-after-free in the JavaScript: WebAssembly component
- CVE-2026-2768: Sandbox escape in the Storage: IndexedDB component
- CVE-2026-2769: Use-after-free in the Storage: IndexedDB component
- CVE-2026-2770: Use-after-free in the DOM: Bindings (WebIDL) component
- CVE-2026-2771: Undefined behavior in the DOM: Core & HTML component
- CVE-2026-2772: Use-after-free in the Audio/Video: Playback component
- CVE-2026-2773: Incorrect boundary conditions in the Web Audio component
- CVE-2026-2774: Integer overflow in the Audio/Video component
- CVE-2026-2775: Mitigation bypass in the DOM: HTML Parser component
- CVE-2026-2776: Sandbox escape due to incorrect boundary conditions in the Telemetry component in External Software
- CVE-2026-2777: Privilege escalation in the Messaging System component
- CVE-2026-2778: Sandbox escape due to incorrect boundary conditions in the DOM: Core & HTML component
- CVE-2026-2779: Incorrect boundary conditions in the Networking: JAR component
- CVE-2026-2780: Privilege escalation in the Netmonitor component
- CVE-2026-2781: Integer overflow in the Libraries component in NSS
- CVE-2026-2782: Privilege escalation in the Netmonitor component
- CVE-2026-2783: Information disclosure due to JIT miscompilation in the JavaScript Engine: JIT component
- CVE-2026-2784: Mitigation bypass in the DOM: Security component
- CVE-2026-2785: Invalid pointer in the JavaScript Engine component
- CVE-2026-2786: Use-after-free in the JavaScript Engine component
- CVE-2026-2787: Use-after-free in the DOM: Window and Location component
- CVE-2026-2788: Incorrect boundary conditions in the Audio/Video: GMP component
- CVE-2026-2789: Use-after-free in the Graphics: ImageLib component
- CVE-2026-2790: Same-origin policy bypass in the Networking: JAR component
- CVE-2026-2791: Mitigation bypass in the Networking: Cache component
- CVE-2026-2792: Memory safety bugs fixed in Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148
- CVE-2026-2793: Memory safety bugs fixed in Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148

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: 301305

File Name: suse_SU-2026-0812-1.nasl

Version: 1.1

Type: local

Agent: unix

Family: SuSE Local Security Checks

Published: 3/6/2026

Updated: 3/6/2026

Supported Sensors: Continuous Assessment, Nessus Agent, 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-2026-2793

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-2026-2778

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: 3/5/2026

Vulnerability Publication Date: 2/24/2026

Reference Information

CVE: CVE-2026-2757, CVE-2026-2758, CVE-2026-2759, CVE-2026-2760, CVE-2026-2761, CVE-2026-2762, CVE-2026-2763, CVE-2026-2764, CVE-2026-2765, CVE-2026-2766, CVE-2026-2767, CVE-2026-2768, CVE-2026-2769, CVE-2026-2770, CVE-2026-2771, CVE-2026-2772, CVE-2026-2773, CVE-2026-2774, CVE-2026-2775, CVE-2026-2776, CVE-2026-2777, CVE-2026-2778, CVE-2026-2779, CVE-2026-2780, CVE-2026-2781, CVE-2026-2782, CVE-2026-2783, CVE-2026-2784, CVE-2026-2785, CVE-2026-2786, CVE-2026-2787, CVE-2026-2788, CVE-2026-2789, CVE-2026-2790, CVE-2026-2791, CVE-2026-2792, CVE-2026-2793

SuSE: SUSE-SU-2026:0812-1

Detections

Analytics