An update for firefox is now available for Red Hat Enterprise Linux 8.4
 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions, and Red Hat Enterprise Linux 8.4 Telecommunications Update Service.

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.

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

Security Fix(es):

* firefox: Use-after-free in WebTransportChild (CVE-2025-1931)

* firefox: AudioIPC StreamData could trigger a use-after-free in the Browser
 process (CVE-2025-1930)

* firefox: Unexpected GC during RegExp bailout processing (CVE-2025-1934)

* firefox: Clickjacking the registerProtocolHandler info-bar  Reporter
 (CVE-2025-1935)

* firefox: thunderbird: Memory safety bugs fixed in Firefox 136, Thunderbird
 136, Firefox ESR 128.8, and Thunderbird 128.8 (CVE-2025-1938)

* firefox: JIT corruption of WASM i32 return values on 64-bit CPUs
 (CVE-2025-1933)

* firefox: thunderbird: Memory safety bugs fixed in Firefox 136, Thunderbird
 136, Firefox ESR 115.21, Firefox ESR 128.8, and Thunderbird 128.8 (CVE-2025-1937)

* firefox: Inconsistent comparator in XSLT sorting led to out-of-bounds access
 (CVE-2025-1932)

* firefox: Adding %00 and a fake extension to a jar: URL changed the
 interpretation of the contents (CVE-2025-1936)

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.

This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

CVE-2025-1930: Use After Free (CWE-416)
CVE-2025-1931: Use After Free (CWE-416)
CVE-2025-1932: Out-of-bounds Read (CWE-125)
CVE-2025-1933: Access of Resource Using Incompatible Type ('Type
 Confusion') (CWE-843)
CVE-2025-1934: Improper Cleanup on Thrown Exception (CWE-460)
CVE-2025-1935: Improper Restriction of Rendered UI Layers or Frames (CWE-1021)
CVE-2025-1936: Improper Check for Unusual or Exceptional Conditions (CWE-754)
CVE-2025-1937: Buffer Copy without Checking Size of Input ('Classic Buffer
 Overflow') (CWE-120)
CVE-2025-1938: Buffer Copy without Checking Size of Input ('Classic Buffer
 Overflow') (CWE-120)