Red Hat Security Advisory: firefox security update
Multiple security vulnerabilities affecting Mozilla Firefox and Thunderbird have been addressed in Red Hat Enterprise Linux 9.4 Extended Update Support. These include memory safety bugs, out-of-bounds read/write, use-after-free, cross-process information leaks, and improper handling of object properties and tag attributes. The update fixes issues in Firefox ESR 140.4, Thunderbird ESR 140.4, Firefox 144, and Thunderbird 144. The vulnerabilities have been rated as important by Red Hat Product Security.
AI Analysis
Technical Summary
This Red Hat security advisory covers several vulnerabilities in Mozilla Firefox and Thunderbird, including CVE-2025-11708 (use-after-free in MediaTrackGraphImpl::GetInstance()), CVE-2025-11709 (out-of-bounds read/write triggered by WebGL textures), CVE-2025-11710 (cross-process information leak via malicious IPC messages), CVE-2025-11711 (modification of non-writable object properties), CVE-2025-11712 (an OBJECT tag type attribute overriding browser behavior without content-type), CVE-2025-11714 and CVE-2025-11715 (memory safety bugs). These issues affect multiple components and could impact browser security and stability. The advisory references fixes included in Firefox ESR 140.4, Thunderbird ESR 140.4, Firefox 144, and Thunderbird 144 packages for Red Hat Enterprise Linux 9.4 Extended Update Support and related variants.
Potential Impact
The vulnerabilities include memory safety bugs, use-after-free, out-of-bounds read/write, and cross-process information leaks, which could lead to crashes, information disclosure, or potential privilege escalation within the browser processes. The advisory rates the security 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 for Red Hat Enterprise Linux 9.4 Extended Update Support and related variants that address these vulnerabilities. Users should apply the provided security updates promptly. For detailed update instructions, refer to the Red Hat advisory at https://access.redhat.com/articles/11258. Patch status is confirmed with official fixes available in Firefox ESR 140.4, Thunderbird ESR 140.4, Firefox 144, and Thunderbird 144 packages.
Red Hat Security Advisory: firefox security update
Description
Multiple security vulnerabilities affecting Mozilla Firefox and Thunderbird have been addressed in Red Hat Enterprise Linux 9.4 Extended Update Support. These include memory safety bugs, out-of-bounds read/write, use-after-free, cross-process information leaks, and improper handling of object properties and tag attributes. The update fixes issues in Firefox ESR 140.4, Thunderbird ESR 140.4, Firefox 144, and Thunderbird 144. The vulnerabilities have been rated as important by Red Hat Product Security.
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This Red Hat security advisory covers several vulnerabilities in Mozilla Firefox and Thunderbird, including CVE-2025-11708 (use-after-free in MediaTrackGraphImpl::GetInstance()), CVE-2025-11709 (out-of-bounds read/write triggered by WebGL textures), CVE-2025-11710 (cross-process information leak via malicious IPC messages), CVE-2025-11711 (modification of non-writable object properties), CVE-2025-11712 (an OBJECT tag type attribute overriding browser behavior without content-type), CVE-2025-11714 and CVE-2025-11715 (memory safety bugs). These issues affect multiple components and could impact browser security and stability. The advisory references fixes included in Firefox ESR 140.4, Thunderbird ESR 140.4, Firefox 144, and Thunderbird 144 packages for Red Hat Enterprise Linux 9.4 Extended Update Support and related variants.
Potential Impact
The vulnerabilities include memory safety bugs, use-after-free, out-of-bounds read/write, and cross-process information leaks, which could lead to crashes, information disclosure, or potential privilege escalation within the browser processes. The advisory rates the security 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 for Red Hat Enterprise Linux 9.4 Extended Update Support and related variants that address these vulnerabilities. Users should apply the provided security updates promptly. For detailed update instructions, refer to the Red Hat advisory at https://access.redhat.com/articles/11258. Patch status is confirmed with official fixes available in Firefox ESR 140.4, Thunderbird ESR 140.4, Firefox 144, and Thunderbird 144 packages.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2025:21059
- Cve Count
- 7
- Additional Cves
- ["CVE-2025-11709","CVE-2025-11710","CVE-2025-11711","CVE-2025-11712","CVE-2025-11714","CVE-2025-11715"]
Threat ID: 6a419cac27e9c79719ab96e2
Added to database: 06/28/2026, 22:14:04 UTC
Last enriched: 06/28/2026, 22:22:00 UTC
Last updated: 09/10/2026, 19:36:49 UTC
Views: 18
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