RHEL 9 : firefox (RHSA-2026:69462)

critical Nessus Plugin ID 348681

Synopsis

The remote Red Hat host is missing one or more security updates for firefox.

Description

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:69462 advisory.

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.

Security Fix(es):

* firefox: thunderbird: Use-after-free in the SVG component (CVE-2026-92024)

* firefox: thunderbird: Mitigation bypass in the Remote Settings Client component (CVE-2026-92019)

* firefox: thunderbird: Use-after-free in the Networking component (CVE-2026-92026)

* firefox: thunderbird: Information disclosure in the Graphics: ImageLib component (CVE-2026-92031)

* firefox: thunderbird: Sandbox escape due to invalid pointer in the Graphics component (CVE-2026-92032)

* firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics:
CanvasWebGL component (CVE-2026-92010)

* firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics:
CanvasWebGL component (CVE-2026-92006)

* firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics:
CanvasWebGL component (CVE-2026-92011)

* firefox: thunderbird: Use-after-free in the DOM: Streams component (CVE-2026-92027)

* firefox: thunderbird: Use-after-free in the DOM: Core & HTML component (CVE-2026-92028)

* firefox: thunderbird: Privilege escalation in the WebExtensions component (CVE-2026-92015)

* firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics:
CanvasWebGL component (CVE-2026-92013)

* firefox: thunderbird: Use-after-free in the Disability Access APIs component (CVE-2026-92016)

* firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics:
CanvasWebGL component (CVE-2026-92012)

* firefox: thunderbird: Use-after-free in the DOM: HTML Parser component (CVE-2026-92022)

* firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics component (CVE-2026-92014)

* firefox: thunderbird: Sandbox escape in the DOM: Core & HTML component (CVE-2026-92018)

* firefox: thunderbird: Use-after-free in the JavaScript Engine: JIT component (CVE-2026-92021)

* firefox: thunderbird: Use-after-free in the Audio/Video: Web Codecs component (CVE-2026-92005)

* firefox: thunderbird: Privilege escalation in the DOM: Service Workers component (CVE-2026-92017)

* firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics:
CanvasWebGL component (CVE-2026-92009)

* firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics:
WebRender component (CVE-2026-92020)

* firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics:
CanvasWebGL component (CVE-2026-92008)

* firefox: thunderbird: Mitigation bypass in the DOM: Copy & Paste and Drag & Drop component (CVE-2026-92030)

* firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics:
CanvasWebGL component (CVE-2026-92007)

* firefox: thunderbird: Use-after-free in the DOM: Navigation component (CVE-2026-92025)

* firefox: thunderbird: Use-after-free in the SVG component (CVE-2026-92029)

* firefox: thunderbird: Use-after-free in the XML component (CVE-2026-92023)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux 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 RHEL firefox package based on the guidance in RHSA-2026:69462.

Plugin Details

Severity: Critical

ID: 348681

File Name: redhat-RHSA-2026-69462.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Red Hat Local Security Checks

Published: 9/21/2026

Updated: 9/21/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 93.3

Vendor

Vendor Severity: Important

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-2026-92032

CVSS v3

Risk Factor: Critical

Base Score: 9.6

Temporal Score: 8.3

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

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

Vulnerability Information

CPE: cpe:/o:redhat:enterprise_linux:9, cpe:/o:redhat:rhel_eus:9.8, p-cpe:/a:redhat:enterprise_linux:firefox-x11, p-cpe:/a:redhat:enterprise_linux:firefox

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

Exploit Ease: No known exploits are available

Patch Publication Date: 9/21/2026

Vulnerability Publication Date: 9/15/2026

Reference Information

CVE: CVE-2026-92005, CVE-2026-92006, CVE-2026-92007, CVE-2026-92008, CVE-2026-92009, CVE-2026-92010, CVE-2026-92011, CVE-2026-92012, CVE-2026-92013, CVE-2026-92014, CVE-2026-92015, CVE-2026-92016, CVE-2026-92017, CVE-2026-92018, CVE-2026-92019, CVE-2026-92020, CVE-2026-92021, CVE-2026-92022, CVE-2026-92023, CVE-2026-92024, CVE-2026-92025, CVE-2026-92026, CVE-2026-92027, CVE-2026-92028, CVE-2026-92029, CVE-2026-92030, CVE-2026-92031, CVE-2026-92032

CWE: 266, 476, 497, 653, 787, 791, 807, 825

RHSA: 2026:69462

Detections

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