Red Hat Security Advisory: firefox security update
Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability. Security Fix(es): * firefox: thunderbird: Denial-of-service due to out-of-memory in the Graphics: WebRender component (CVE-2025-9182) * thunderbird: firefox: Sandbox escape due to invalid pointer in the Audio/Video: GMP component (CVE-2025-9179) * thunderbird: firefox: Same-origin policy bypass in the Graphics: Canvas2D component (CVE-2025-9180) * thunderbird: firefox: Uninitialized memory in the JavaScript Engine component (CVE-2025-9181) * thunderbird: firefox: Memory safety bugs fixed in Firefox ESR 115.27, Firefox ESR 128.14, Thunderbird ESR 128.14, Firefox ESR 140.2, Thunderbird ESR 140.2, Firefox 142 and Thunderbird 142 (CVE-2025-9185) 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.
AI Analysis
Technical Summary
This Red Hat security advisory addresses multiple vulnerabilities in Mozilla Firefox and Thunderbird, including CVE-2025-9179 (sandbox escape via invalid pointer in Audio/Video GMP component), CVE-2025-9180 (same-origin policy bypass in Graphics Canvas2D), CVE-2025-9181 (uninitialized memory in JavaScript Engine), CVE-2025-9182 (denial-of-service due to out-of-memory in Graphics WebRender), and CVE-2025-9185 (memory safety bugs). These vulnerabilities affect various components related to graphics rendering, audio/video processing, and JavaScript execution. The fixes are included in updated Firefox ESR and Thunderbird ESR versions as well as Firefox and Thunderbird version 142.
Potential Impact
The vulnerabilities could allow denial-of-service conditions, sandbox escapes, bypass of same-origin policy, and memory safety issues, potentially leading to security breaches such as unauthorized code execution or information disclosure. The advisory rates the impact as Important (high severity). No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released updated Firefox and Thunderbird packages addressing these vulnerabilities for Red Hat Enterprise Linux 8.4 Extended Update Support and Advanced Update Support. Users should apply these official updates as detailed in the Red Hat advisory (RHSA-2025:15419) to remediate the issues. For update instructions, refer to https://access.redhat.com/articles/11258. Patch status is confirmed with official fixes available.
Red Hat Security Advisory: firefox security update
Description
Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability. Security Fix(es): * firefox: thunderbird: Denial-of-service due to out-of-memory in the Graphics: WebRender component (CVE-2025-9182) * thunderbird: firefox: Sandbox escape due to invalid pointer in the Audio/Video: GMP component (CVE-2025-9179) * thunderbird: firefox: Same-origin policy bypass in the Graphics: Canvas2D component (CVE-2025-9180) * thunderbird: firefox: Uninitialized memory in the JavaScript Engine component (CVE-2025-9181) * thunderbird: firefox: Memory safety bugs fixed in Firefox ESR 115.27, Firefox ESR 128.14, Thunderbird ESR 128.14, Firefox ESR 140.2, Thunderbird ESR 140.2, Firefox 142 and Thunderbird 142 (CVE-2025-9185) 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 software
pkg:rpm/redhat/firefoxpkg:rpm/redhat/thunderbirdRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This Red Hat security advisory addresses multiple vulnerabilities in Mozilla Firefox and Thunderbird, including CVE-2025-9179 (sandbox escape via invalid pointer in Audio/Video GMP component), CVE-2025-9180 (same-origin policy bypass in Graphics Canvas2D), CVE-2025-9181 (uninitialized memory in JavaScript Engine), CVE-2025-9182 (denial-of-service due to out-of-memory in Graphics WebRender), and CVE-2025-9185 (memory safety bugs). These vulnerabilities affect various components related to graphics rendering, audio/video processing, and JavaScript execution. The fixes are included in updated Firefox ESR and Thunderbird ESR versions as well as Firefox and Thunderbird version 142.
Potential Impact
The vulnerabilities could allow denial-of-service conditions, sandbox escapes, bypass of same-origin policy, and memory safety issues, potentially leading to security breaches such as unauthorized code execution or information disclosure. The advisory rates the impact as Important (high severity). No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released updated Firefox and Thunderbird packages addressing these vulnerabilities for Red Hat Enterprise Linux 8.4 Extended Update Support and Advanced Update Support. Users should apply these official updates as detailed in the Red Hat advisory (RHSA-2025:15419) to remediate the issues. For update instructions, refer to https://access.redhat.com/articles/11258. Patch status is confirmed with official fixes available.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2025:15419
- Cve Count
- 5
- Additional Cves
- ["CVE-2025-9180","CVE-2025-9181","CVE-2025-9182","CVE-2025-9185"]
Threat ID: 6a3cc29a4853345fc16d282a
Added to database: 06/25/2026, 05:54:34 UTC
Last enriched: 06/25/2026, 06:19:41 UTC
Last updated: 09/10/2026, 19:36:52 UTC
Views: 28
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