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RLSA-2026:93443

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RLSA-2026:93443

Published: 3 Nov 2026Last Modified: 3 Nov 2026

Upstream:

CVE-2026-109704

CVE-2026-109705

CVE-2026-109706

Summary: Important: thunderbird security, bug fix, and enhancement update

Details: Mozilla Thunderbird is a standalone mail and newsgroup client. Security Fix(es): * libexpat: denial of service via crafted XML input (CVE-2026-45186) * firefox: Mitigation bypass in the Enterprise Policies component (CVE-2026-109764) * firefox: Spoofing issue in the DOM: Web Serial component (CVE-2026-109770) * firefox: Mitigation bypass in the File Handling component (CVE-2026-109783) * firefox: thunderbird: Privilege escalation in the Application Update component (CVE-2026-109704) * firefox: Use-after-free in the XML component (CVE-2026-109718) * firefox: Information disclosure in the PDF Viewer component (CVE-2026-109742) * firefox: Incorrect boundary conditions in the JavaScript Engine component (CVE-2026-109715) * firefox: firefox: Sandbox escape via incorrect boundary conditions in Win32 widget (CVE-2026-109740) * firefox: Use-after-free in the Storage: IndexedDB component (CVE-2026-109706) * firefox: Use-after-free in the Crash Reporting component (CVE-2026-109713) * firefox: Use-after-free in the DOM: Core & HTML component (CVE-2026-109724) * firefox: Sandbox escape due to uninitialized memory in the DOM: Web Serial component (CVE-2026-109745) * firefox: Mitigation bypass in the File Handling component (CVE-2026-109782) * firefox: Information disclosure, privilege escalation in the Security: Process Sandboxing component (CVE-2026-109709) * firefox: Sandbox escape, site isolation issue due to incorrect boundary conditions, use-after-free in the Networking component (CVE-2026-109705) * firefox: Use-after-free in the Audio/Video: Playback component (CVE-2026-109738) * firefox: Sandbox escape due to race condition in the Networking component (CVE-2026-109757) * firefox: Use-after-free in the Storage: Bucket File System component (CVE-2026-109741) * firefox: Use-after-free in the JavaScript Engine: JIT component (CVE-2026-109729) * firefox: Other issue in the DOM: File component (CVE-2026-109744) * firefox: Incorrect boundary conditions in the JavaScript Engine component (CVE-2026-109716) * firefox: Race condition, use-after-free in the Graphics: CanvasWebGL component (CVE-2026-109719) * firefox: Incorrect boundary conditions in the Layout component (CVE-2026-109753) * firefox: Integer overflow in the Layout: Text and Fonts component (CVE-2026-109723) * firefox: Privilege escalation in the DOM: Navigation component (CVE-2026-109756) * firefox: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-109733) * firefox: thunderbird: Mitigation bypass in the DOM: Security component (CVE-2026-109734) * firefox: Mitigation bypass in the File Handling component (CVE-2026-109763) * firefox: Sandbox escape due to incorrect boundary conditions in the Networking component (CVE-2026-109708) * firefox: Use-after-free in the DOM: Bindings (WebIDL) component (CVE-2026-109717) * firefox: Use-after-free in the DOM: Workers component (CVE-2026-109752) * firefox: Race condition in the XPCOM component (CVE-2026-109776) * firefox: Sandbox escape due to use-after-free in the Networking component (CVE-2026-109707) * firefox: Mitigation bypass in the Networking: HTTP component (CVE-2026-109760) * firefox: JIT miscompilation in the JavaScript: WebAssembly component (CVE-2026-109720) * firefox: Information disclosure in the Storage: IndexedDB component (CVE-2026-109777) * firefox: Use-after-free in the SVG component (CVE-2026-109726) * firefox: Integer overflow in the Graphics component (CVE-2026-109730) * firefox: Use-after-free in the Audio/Video component (CVE-2026-109727) * firefox: Mitigation bypass in the Enterprise Policies component (CVE-2026-109737) * firefox: Mitigation bypass in the Enterprise Policies component (CVE-2026-109766) * firefox: Use-after-free in the DOM: Streams component (CVE-2026-109732) * firefox: Site isolation issue in the Networking component (CVE-2026-109759) * firefox: Privilege escalation in the WebExtensions component (CVE-2026-109778) * firefox: Incorrect boundary conditions in the SVG component (CVE-2026-109762) * firefox: Race condition, use-after-free in the Graphics: Text component (CVE-2026-109765) * firefox: Incorrect boundary conditions in the DOM: Editor component (CVE-2026-109754) * firefox: Information disclosure in the Networking component (CVE-2026-109751) * firefox: Use-after-free in the DOM: Core & HTML component (CVE-2026-109725) * firefox: Sandbox escape due to uninitialized memory in the Graphics component (CVE-2026-109712) * firefox: Use-after-free in the Graphics: Canvas2D component (CVE-2026-109711) * firefox: Frame poisoning in the Layout component (CVE-2026-109736) * firefox: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-109722) * firefox: Information disclosure in the Networking component (CVE-2026-109767) * firefox: Denial-of-service in the WebRTC component (CVE-2026-109775) * firefox: Use-after-free in the DOM: Animation component (CVE-2026-109728) * firefox: Denial-of-service in the Printing: Output component (CVE-2026-109781) * firefox: thunderbird: Use-after-free in the Graphics: Text component (CVE-2026-109710) * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-109731) * firefox: Incorrect boundary conditions in the JavaScript Engine: JIT component (CVE-2026-109721) * firefox: Privilege escalation in the Panning and Zooming component (CVE-2026-109743) Bug Fix(es) and Enhancement(s): * Thunderbird ESR 153 rebase [rhel-9.8.z] (JIRA:Rocky Linux-175199) 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.

Affected packages

Package

Name: thunderbird

Purl: pkg:rpm/rocky-linux/thunderbird?distro=rocky-linux-9&epoch=0

Affected ranges

Type: ECOSYSTEM

Events:

Introduced- 0

Fixed -0:153.5.0-1.el9_8

Affected versions

Common Vulnerability Scoring System

Attack Vector

Network

Adjacent

Local

Physical

Privileges Required

None

Low

High

User Interaction

None

Required

Scope

Unchanged

Changed

Confidentiality

None

Low

High

Integrity

None

Low

High

Availability

None

Low

High