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, sandbox escape, same-origin policy bypass, uninitialized memory, and memory safety bugs. The fixes are included in Firefox ESR versions 115.27, 128.14, 140.2, Thunderbird ESR 128.14, 140.2, and Firefox and Thunderbird version 142. The update is rated as important by Red Hat Product Security.
AI Analysis
Technical Summary
This Red Hat security advisory addresses several vulnerabilities in Mozilla Firefox and Thunderbird. The issues include a denial-of-service caused by out-of-memory in the Graphics: WebRender component (CVE-2025-9182), a sandbox escape due to an invalid pointer in the Audio/Video: GMP component (CVE-2025-9179), a same-origin policy bypass in the Graphics: Canvas2D component (CVE-2025-9180), uninitialized memory in the JavaScript Engine component (CVE-2025-9181), and multiple memory safety bugs (CVE-2025-9185). These vulnerabilities affect various ESR and standard releases of Firefox and Thunderbird. Red Hat has released updated packages for Red Hat Enterprise Linux 8.8 variants to address these issues.
Potential Impact
The vulnerabilities collectively could allow denial-of-service conditions, sandbox escapes, bypass of same-origin policy, exposure of uninitialized memory, and other memory safety issues in Firefox and Thunderbird. These issues may compromise browser security, potentially allowing attackers to escape sandbox restrictions or bypass security policies. The advisory rates the security impact as important (high severity). There are no known exploits in the wild at the time of this advisory.
Mitigation Recommendations
Red Hat has released updated Firefox packages that fix these vulnerabilities. Users of affected Red Hat Enterprise Linux 8.8 variants should apply the Firefox update as detailed in the Red Hat advisory RHSA-2025:15424 and the referenced article https://access.redhat.com/articles/11258. Applying these official updates is the recommended remediation. Patch status is confirmed as fixed in the updated Firefox ESR 128.14 packages and related versions listed in the advisory.
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, sandbox escape, same-origin policy bypass, uninitialized memory, and memory safety bugs. The fixes are included in Firefox ESR versions 115.27, 128.14, 140.2, Thunderbird ESR 128.14, 140.2, and Firefox and Thunderbird version 142. The update is rated as important by Red Hat Product Security.
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 several vulnerabilities in Mozilla Firefox and Thunderbird. The issues include a denial-of-service caused by out-of-memory in the Graphics: WebRender component (CVE-2025-9182), a sandbox escape due to an invalid pointer in the Audio/Video: GMP component (CVE-2025-9179), a same-origin policy bypass in the Graphics: Canvas2D component (CVE-2025-9180), uninitialized memory in the JavaScript Engine component (CVE-2025-9181), and multiple memory safety bugs (CVE-2025-9185). These vulnerabilities affect various ESR and standard releases of Firefox and Thunderbird. Red Hat has released updated packages for Red Hat Enterprise Linux 8.8 variants to address these issues.
Potential Impact
The vulnerabilities collectively could allow denial-of-service conditions, sandbox escapes, bypass of same-origin policy, exposure of uninitialized memory, and other memory safety issues in Firefox and Thunderbird. These issues may compromise browser security, potentially allowing attackers to escape sandbox restrictions or bypass security policies. The advisory rates the security impact as important (high severity). There are no known exploits in the wild at the time of this advisory.
Mitigation Recommendations
Red Hat has released updated Firefox packages that fix these vulnerabilities. Users of affected Red Hat Enterprise Linux 8.8 variants should apply the Firefox update as detailed in the Red Hat advisory RHSA-2025:15424 and the referenced article https://access.redhat.com/articles/11258. Applying these official updates is the recommended remediation. Patch status is confirmed as fixed in the updated Firefox ESR 128.14 packages and related versions listed in the advisory.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2025:15424
- Cve Count
- 5
- Additional Cves
- ["CVE-2025-9180","CVE-2025-9181","CVE-2025-9182","CVE-2025-9185"]
- Cvss Version
- null
Threat ID: 6a3cc29a4853345fc16d27f1
Added to database: 06/25/2026, 05:54:34 UTC
Last enriched: 06/25/2026, 06:31:14 UTC
Last updated: 06/25/2026, 21:00:48 UTC
Views: 3
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