RHSA-2025:22374 — Security Advisory

Red Hat Security Advisory: firefox security update

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Severity

Important

Red Hat Product Security

RHEL 9

Products

Official CSAF product identity

Published · December 1, 2025

Updated · June 30, 2026

Topic

An update for firefox is now available for Red Hat Enterprise Linux 9.4 Extended Update Support.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

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

Security Fix(es):

  • firefox: Mitigation bypass in the DOM: Security component (CVE-2025-13018)

  • firefox: Use-after-free in the Audio/Video component (CVE-2025-13014)

  • firefox: Incorrect boundary conditions in the JavaScript: WebAssembly component (CVE-2025-13016)

  • firefox: Same-origin policy bypass in the DOM: Workers component (CVE-2025-13019)

  • firefox: Use-after-free in the WebRTC: Audio/Video component (CVE-2025-13020)

  • firefox: Race condition in the Graphics component (CVE-2025-13012)

  • firefox: Spoofing issue in Firefox (CVE-2025-13015)

  • firefox: Mitigation bypass in the DOM: Core & HTML component (CVE-2025-13013)

  • firefox: Same-origin policy bypass in the DOM: Notifications component (CVE-2025-13017)

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.

Related CVEs

RHSA-2025:22374 — Red Hat Security Advisory: firefox security update | PulseLinux