SUSE SLED15 / SLES15 Security Update : MozillaFirefox (SUSE-SU-2026:1649-1)

critical Nessus Plugin ID 311757

Synopsis

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

Description

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:1649-1 advisory.

This update for MozillaFirefox fixes the following issue:

Update to Firefox Extended Support Release 140.10.0 ESR (bsc#1262230, MFSA 2026-32):

- 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.
- CVE-2026-6754: Use-after-free in the JavaScript Engine component.
- CVE-2026-6757: Invalid pointer in the JavaScript: WebAssembly component.
- CVE-2026-6759: Use-after-free in the Widget: Cocoa component.
- CVE-2026-6761: Privilege escalation in the Networking component.
- CVE-2026-6762: Spoofing issue in the DOM: Core & HTML component.
- CVE-2026-6763: Mitigation bypass in the File Handling component.
- CVE-2026-6764: Incorrect boundary conditions in the DOM: Device Interfaces component.
- CVE-2026-6765: Information disclosure in the Form Autofill component.
- CVE-2026-6766: Incorrect boundary conditions in the Libraries component in NSS.
- CVE-2026-6767: Other issue in the Libraries component in NSS.
- CVE-2026-6769: Privilege escalation in the Debugger component.
- CVE-2026-6770: Other issue in the Storage: IndexedDB component.
- CVE-2026-6771: Mitigation bypass in the DOM: Security component.
- CVE-2026-6772: Incorrect boundary conditions in the Libraries component in NSS.
- CVE-2026-6776: Incorrect boundary conditions in the WebRTC: Networking component.
- CVE-2026-6785: Memory safety bugs fixed in Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150.
- CVE-2026-6786: Memory safety bugs fixed in Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150.

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

Plugin Details

Severity: Critical

ID: 311757

File Name: suse_SU-2026-1649-1.nasl

Version: 1.1

Type: Local

Agent: unix

Family: SuSE Local Security Checks

Published: 5/2/2026

Updated: 5/2/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

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

CVSS Score Source: CVE-2026-6771

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

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:P/RL:O/RC:C

Vulnerability Information

CPE: 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, cpe:/o:novell:suse_linux:15

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/28/2026

Vulnerability Publication Date: 4/21/2026

Reference Information

CVE: 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

SuSE: SUSE-SU-2026:1649-1

Detections

Analytics