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 115.27, 128.14, 140.2, Thunderbird ESR 128.14, 140.2, and Firefox 142 and Thunderbird 142 versions. 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, including CVE-2025-9179 (sandbox escape via invalid pointer in the GMP component), CVE-2025-9180 (same-origin policy bypass in Canvas2D), CVE-2025-9181 (uninitialized memory in the JavaScript engine), CVE-2025-9182 (denial-of-service due to out-of-memory in WebRender), and CVE-2025-9185 (memory safety bugs). These vulnerabilities affect multiple components related to graphics, audio/video, and JavaScript engine. The advisory provides updated packages for Red Hat Enterprise Linux 10 and its variants, including Extended Update Support and Extended Life Cycle versions, with fixes applied in Firefox ESR 128.14.0-2.el10_0 and related Thunderbird versions.
Potential Impact
The vulnerabilities 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 impact the security boundaries within the browser and email client, potentially leading to compromised confidentiality, integrity, or availability. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released updated Firefox and Thunderbird packages that address these vulnerabilities. Users of Red Hat Enterprise Linux 10 and its supported variants should apply the security update RHSA-2025:14417 promptly to remediate these issues. Detailed update instructions are available at https://access.redhat.com/articles/11258. Since this is an official fix, applying the update is the recommended mitigation.
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 115.27, 128.14, 140.2, Thunderbird ESR 128.14, 140.2, and Firefox 142 and Thunderbird 142 versions. The update is rated as Important by Red Hat Product Security.
Affected software
Run 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, including CVE-2025-9179 (sandbox escape via invalid pointer in the GMP component), CVE-2025-9180 (same-origin policy bypass in Canvas2D), CVE-2025-9181 (uninitialized memory in the JavaScript engine), CVE-2025-9182 (denial-of-service due to out-of-memory in WebRender), and CVE-2025-9185 (memory safety bugs). These vulnerabilities affect multiple components related to graphics, audio/video, and JavaScript engine. The advisory provides updated packages for Red Hat Enterprise Linux 10 and its variants, including Extended Update Support and Extended Life Cycle versions, with fixes applied in Firefox ESR 128.14.0-2.el10_0 and related Thunderbird versions.
Potential Impact
The vulnerabilities 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 impact the security boundaries within the browser and email client, potentially leading to compromised confidentiality, integrity, or availability. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released updated Firefox and Thunderbird packages that address these vulnerabilities. Users of Red Hat Enterprise Linux 10 and its supported variants should apply the security update RHSA-2025:14417 promptly to remediate these issues. Detailed update instructions are available at https://access.redhat.com/articles/11258. Since this is an official fix, applying the update is the recommended mitigation.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2025:14417
- Cve Count
- 5
- Additional Cves
- ["CVE-2025-9180","CVE-2025-9181","CVE-2025-9182","CVE-2025-9185"]
- Cvss Version
- null
Threat ID: 6a3cc29d4853345fc16d3a3e
Added to database: 06/25/2026, 05:54:37 UTC
Last enriched: 06/25/2026, 06:03:35 UTC
Last updated: 06/25/2026, 13:00:48 UTC
Views: 4
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.