RLSA-2026:89758

    Dashboard / Vulnerabilities / RLSA-2026:89758

    RLSA-2026:89758

    Published: 31 Oct 2026Last Modified: 31 Oct 2026

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

    Details: Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability. Security Fix(es): * libexpat: denial of service via crafted XML input (CVE-2026-45186) * expat: expat: Information disclosure via heap buffer over-read in XML_ParseBuffer (CVE-2026-77214) * firefox: thunderbird: Privilege escalation in the Application Update component (CVE-2026-109704) * firefox: Use-after-free in the XML component (CVE-2026-109718) * 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: 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 JavaScript Engine: JIT component (CVE-2026-109729) * 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: Integer overflow in the Layout: Text and Fonts component (CVE-2026-109723) * 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: Sandbox escape due to use-after-free in the Networking component (CVE-2026-109707) * firefox: JIT miscompilation in the JavaScript: WebAssembly component (CVE-2026-109720) * 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: Use-after-free in the DOM: Streams component (CVE-2026-109732) * 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: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-109722) * firefox: Use-after-free in the DOM: Animation component (CVE-2026-109728) * firefox: Incorrect boundary conditions in the JavaScript Engine: JIT component (CVE-2026-109721) Bug Fix(es) and Enhancement(s): * Firefox ESR 153 rebase [rhel-10.2.z] (JIRA:Rocky Linux-175166) 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.

    References: https://errata.rockylinux.org/RLSA-2026:89758, https://bugzilla.redhat.com/show_bug.cgi?id=2468575, https://bugzilla.redhat.com/show_bug.cgi?id=2547476, https://bugzilla.redhat.com/show_bug.cgi?id=2550397, https://bugzilla.redhat.com/show_bug.cgi?id=2550400, https://bugzilla.redhat.com/show_bug.cgi?id=2550403, https://bugzilla.redhat.com/show_bug.cgi?id=2550404, https://bugzilla.redhat.com/show_bug.cgi?id=2550405, https://bugzilla.redhat.com/show_bug.cgi?id=2550406, https://bugzilla.redhat.com/show_bug.cgi?id=2550408, https://bugzilla.redhat.com/show_bug.cgi?id=2550412, https://bugzilla.redhat.com/show_bug.cgi?id=2550413, https://bugzilla.redhat.com/show_bug.cgi?id=2550420, https://bugzilla.redhat.com/show_bug.cgi?id=2550422, https://bugzilla.redhat.com/show_bug.cgi?id=2550424, https://bugzilla.redhat.com/show_bug.cgi?id=2550426, https://bugzilla.redhat.com/show_bug.cgi?id=2550432, https://bugzilla.redhat.com/show_bug.cgi?id=2550433, https://bugzilla.redhat.com/show_bug.cgi?id=2550438, https://bugzilla.redhat.com/show_bug.cgi?id=2550442, https://bugzilla.redhat.com/show_bug.cgi?id=2550446, https://bugzilla.redhat.com/show_bug.cgi?id=2550450, https://bugzilla.redhat.com/show_bug.cgi?id=2550451, https://bugzilla.redhat.com/show_bug.cgi?id=2550455, https://bugzilla.redhat.com/show_bug.cgi?id=2550467, https://bugzilla.redhat.com/show_bug.cgi?id=2550468, https://bugzilla.redhat.com/show_bug.cgi?id=2550469, https://bugzilla.redhat.com/show_bug.cgi?id=2550471, https://bugzilla.redhat.com/show_bug.cgi?id=2550474, https://bugzilla.redhat.com/show_bug.cgi?id=2550478, https://access.redhat.com/errata/RHSA-2026:89758

    Affected packages

    Package

    Name: firefox

    Purl: pkg:rpm/rocky-linux/firefox?distro=rocky-linux-10&epoch=0

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -0:153.5.0-1.el10_2

    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
    RLSA-2026:89758 | CVE-DB