Red Hat Security Advisory: firefox security update
Multiple security vulnerabilities affecting Mozilla Firefox and Thunderbird have been addressed in a Red Hat security update. These include denial-of-service due to out-of-memory in the Graphics WebRender component, sandbox escape via an invalid pointer in the Audio/Video GMP component, same-origin policy bypass in the Graphics Canvas2D component, uninitialized memory in the JavaScript Engine, and various memory safety bugs. The update is classified as important and affects Red Hat Enterprise Linux 8.2 Advanced Update Support. Users are advised to apply the provided security update to mitigate these issues.
AI Analysis
Technical Summary
This Red Hat security advisory addresses five vulnerabilities in Mozilla Firefox and Thunderbird components: CVE-2025-9182 (denial-of-service via out-of-memory in Graphics WebRender), CVE-2025-9179 (sandbox escape due to invalid pointer in Audio/Video GMP), CVE-2025-9180 (same-origin policy bypass in Graphics Canvas2D), CVE-2025-9181 (uninitialized memory in JavaScript Engine), and CVE-2025-9185 (memory safety bugs fixed in multiple ESR and standard releases). The vulnerabilities affect Firefox ESR versions 115.27, 128.14, 140.2, Thunderbird ESR 128.14, 140.2, and Firefox and Thunderbird version 142. The advisory provides updated packages for Red Hat Enterprise Linux Server AUS 8.2 x86_64. No CVSS scores are provided in the advisory, but the overall severity is rated as important by Red Hat.
Potential Impact
Successful exploitation of these vulnerabilities could lead to denial-of-service conditions, sandbox escapes, bypass of same-origin policy protections, exposure of uninitialized memory, and other memory safety issues in Firefox and Thunderbird. These impacts could compromise the security boundaries of the browser and email client, potentially allowing attackers to execute unauthorized code or access sensitive information. The advisory does not report known exploits in the wild.
Mitigation Recommendations
Red Hat has released updated Firefox packages for Red Hat Enterprise Linux 8.2 AUS that address these vulnerabilities. Users should apply the security update as described in the Red Hat advisory (RHSA-2025:15418) and the referenced article https://access.redhat.com/articles/11258. Applying this update mitigates the described security issues. No additional mitigations or workarounds are specified or required.
Red Hat Security Advisory: firefox security update
Description
Multiple security vulnerabilities affecting Mozilla Firefox and Thunderbird have been addressed in a Red Hat security update. These include denial-of-service due to out-of-memory in the Graphics WebRender component, sandbox escape via an invalid pointer in the Audio/Video GMP component, same-origin policy bypass in the Graphics Canvas2D component, uninitialized memory in the JavaScript Engine, and various memory safety bugs. The update is classified as important and affects Red Hat Enterprise Linux 8.2 Advanced Update Support. Users are advised to apply the provided security update to mitigate these issues.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This Red Hat security advisory addresses five vulnerabilities in Mozilla Firefox and Thunderbird components: CVE-2025-9182 (denial-of-service via out-of-memory in Graphics WebRender), CVE-2025-9179 (sandbox escape due to invalid pointer in Audio/Video GMP), CVE-2025-9180 (same-origin policy bypass in Graphics Canvas2D), CVE-2025-9181 (uninitialized memory in JavaScript Engine), and CVE-2025-9185 (memory safety bugs fixed in multiple ESR and standard releases). The vulnerabilities affect Firefox ESR versions 115.27, 128.14, 140.2, Thunderbird ESR 128.14, 140.2, and Firefox and Thunderbird version 142. The advisory provides updated packages for Red Hat Enterprise Linux Server AUS 8.2 x86_64. No CVSS scores are provided in the advisory, but the overall severity is rated as important by Red Hat.
Potential Impact
Successful exploitation of these vulnerabilities could lead to denial-of-service conditions, sandbox escapes, bypass of same-origin policy protections, exposure of uninitialized memory, and other memory safety issues in Firefox and Thunderbird. These impacts could compromise the security boundaries of the browser and email client, potentially allowing attackers to execute unauthorized code or access sensitive information. The advisory does not report known exploits in the wild.
Mitigation Recommendations
Red Hat has released updated Firefox packages for Red Hat Enterprise Linux 8.2 AUS that address these vulnerabilities. Users should apply the security update as described in the Red Hat advisory (RHSA-2025:15418) and the referenced article https://access.redhat.com/articles/11258. Applying this update mitigates the described security issues. No additional mitigations or workarounds are specified or required.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2025:15418
- Cve Count
- 5
- Additional Cves
- ["CVE-2025-9180","CVE-2025-9181","CVE-2025-9182","CVE-2025-9185"]
- Cvss Version
- null
Threat ID: 6a3cc29a4853345fc16d2834
Added to database: 06/25/2026, 05:54:34 UTC
Last enriched: 06/25/2026, 06:19:30 UTC
Last updated: 06/25/2026, 13:00:48 UTC
Views: 2
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