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 memory safety bugs, out-of-bounds read/write issues, use-after-free vulnerabilities, cross-process information leaks, and improper handling of OBJECT tag attributes. The update fixes these issues in Firefox ESR 140.4, Thunderbird ESR 140.4, Firefox 144, and Thunderbird 144. The vulnerabilities have been rated with a high security impact by Red Hat. No known exploits in the wild have been reported at this time.
AI Analysis
Technical Summary
This Red Hat security advisory addresses 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 some non-writable Object properties), CVE-2025-11712 (an OBJECT tag type attribute overriding browser behavior without content-type), CVE-2025-11714 (memory safety bugs), and CVE-2025-11715 (memory safety bugs fixed in Firefox ESR 140.4, Thunderbird ESR 140.4, Firefox 144, and Thunderbird 144). These vulnerabilities affect Red Hat Enterprise Linux 8.4 Extended Update Support and AUS versions. The advisory provides updated Firefox packages to remediate these issues.
Potential Impact
The vulnerabilities include memory safety bugs, use-after-free conditions, out-of-bounds memory access, cross-process information leaks, and improper handling of web content attributes. These issues could potentially lead to crashes, information disclosure, or unauthorized modification of browser behavior. Red Hat rates the security impact as Important (high). No known exploits in the wild have been reported.
Mitigation Recommendations
Red Hat has released updated Firefox packages (version 140.4.0-3.el8_4) for Red Hat Enterprise Linux 8.4 Extended Update Support and AUS to address these vulnerabilities. Users should apply these official updates promptly to remediate the issues. For detailed update instructions, refer to Red Hat's advisory at https://access.redhat.com/articles/11258. No additional mitigation actions are specified or required beyond applying the provided updates.
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 memory safety bugs, out-of-bounds read/write issues, use-after-free vulnerabilities, cross-process information leaks, and improper handling of OBJECT tag attributes. The update fixes these issues in Firefox ESR 140.4, Thunderbird ESR 140.4, Firefox 144, and Thunderbird 144. The vulnerabilities have been rated with a high security impact by Red Hat. No known exploits in the wild have been reported at this time.
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This Red Hat security advisory addresses 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 some non-writable Object properties), CVE-2025-11712 (an OBJECT tag type attribute overriding browser behavior without content-type), CVE-2025-11714 (memory safety bugs), and CVE-2025-11715 (memory safety bugs fixed in Firefox ESR 140.4, Thunderbird ESR 140.4, Firefox 144, and Thunderbird 144). These vulnerabilities affect Red Hat Enterprise Linux 8.4 Extended Update Support and AUS versions. The advisory provides updated Firefox packages to remediate these issues.
Potential Impact
The vulnerabilities include memory safety bugs, use-after-free conditions, out-of-bounds memory access, cross-process information leaks, and improper handling of web content attributes. These issues could potentially lead to crashes, information disclosure, or unauthorized modification of browser behavior. Red Hat rates the security impact as Important (high). No known exploits in the wild have been reported.
Mitigation Recommendations
Red Hat has released updated Firefox packages (version 140.4.0-3.el8_4) for Red Hat Enterprise Linux 8.4 Extended Update Support and AUS to address these vulnerabilities. Users should apply these official updates promptly to remediate the issues. For detailed update instructions, refer to Red Hat's advisory at https://access.redhat.com/articles/11258. No additional mitigation actions are specified or required beyond applying the provided updates.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2025:21055
- 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: 6a419cad27e9c79719ab9dcf
Added to database: 06/28/2026, 22:14:05 UTC
Last enriched: 06/28/2026, 22:22:22 UTC
Last updated: 09/10/2026, 19:36:49 UTC
Views: 23
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