Red Hat Security Advisory: thunderbird security update
Multiple security vulnerabilities affecting Mozilla Thunderbird have been addressed in a Red Hat security advisory. 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 rated as Important by Red Hat Product Security and affects Red Hat Enterprise Linux 9 variants. The advisory provides updated Thunderbird packages to remediate these issues.
AI Analysis
Technical Summary
This Red Hat security advisory addresses five vulnerabilities in Mozilla Thunderbird and Firefox components integrated within Thunderbird. The issues include CVE-2025-9179 (sandbox escape due to invalid pointer in the Audio/Video GMP component), CVE-2025-9180 (same-origin policy bypass in Graphics Canvas2D), CVE-2025-9181 (uninitialized memory in the JavaScript Engine), CVE-2025-9182 (denial-of-service from out-of-memory in Graphics WebRender), and CVE-2025-9185 (memory safety bugs fixed across multiple ESR and standard releases of Firefox and Thunderbird). The advisory updates Thunderbird to version 128.14.0-3.el9_6 on Red Hat Enterprise Linux 9 and related variants to mitigate these vulnerabilities.
Potential Impact
The vulnerabilities collectively could allow denial-of-service conditions, sandbox escapes, bypass of same-origin policy protections, exposure of uninitialized memory, and other memory safety issues. These could potentially lead to unauthorized code execution or information disclosure within the Thunderbird mail client environment. Red Hat rates the security impact as Important, indicating a high severity level but not critical.
Mitigation Recommendations
Red Hat has released updated Thunderbird packages for Red Hat Enterprise Linux 9 and its variants that address these vulnerabilities. Users should apply the Thunderbird update to version 128.14.0-3.el9_6 or later as provided by Red Hat to remediate these issues. Detailed update instructions are available in the Red Hat advisory at https://access.redhat.com/articles/11258. No additional mitigations are specified beyond applying the official update.
Red Hat Security Advisory: thunderbird security update
Description
Multiple security vulnerabilities affecting Mozilla Thunderbird have been addressed in a Red Hat security advisory. 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 rated as Important by Red Hat Product Security and affects Red Hat Enterprise Linux 9 variants. The advisory provides updated Thunderbird packages to remediate these issues.
Affected software
pkg: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 five vulnerabilities in Mozilla Thunderbird and Firefox components integrated within Thunderbird. The issues include CVE-2025-9179 (sandbox escape due to invalid pointer in the Audio/Video GMP component), CVE-2025-9180 (same-origin policy bypass in Graphics Canvas2D), CVE-2025-9181 (uninitialized memory in the JavaScript Engine), CVE-2025-9182 (denial-of-service from out-of-memory in Graphics WebRender), and CVE-2025-9185 (memory safety bugs fixed across multiple ESR and standard releases of Firefox and Thunderbird). The advisory updates Thunderbird to version 128.14.0-3.el9_6 on Red Hat Enterprise Linux 9 and related variants to mitigate these vulnerabilities.
Potential Impact
The vulnerabilities collectively could allow denial-of-service conditions, sandbox escapes, bypass of same-origin policy protections, exposure of uninitialized memory, and other memory safety issues. These could potentially lead to unauthorized code execution or information disclosure within the Thunderbird mail client environment. Red Hat rates the security impact as Important, indicating a high severity level but not critical.
Mitigation Recommendations
Red Hat has released updated Thunderbird packages for Red Hat Enterprise Linux 9 and its variants that address these vulnerabilities. Users should apply the Thunderbird update to version 128.14.0-3.el9_6 or later as provided by Red Hat to remediate these issues. Detailed update instructions are available in the Red Hat advisory at https://access.redhat.com/articles/11258. No additional mitigations are specified beyond applying the official update.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2025:14640
- Cve Count
- 5
- Additional Cves
- ["CVE-2025-9180","CVE-2025-9181","CVE-2025-9182","CVE-2025-9185"]
- Cvss Version
- null
Threat ID: 6a3cc29d4853345fc16d3851
Added to database: 06/25/2026, 05:54:37 UTC
Last enriched: 06/25/2026, 06:16:04 UTC
Last updated: 06/26/2026, 02:00:48 UTC
Views: 5
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