Red Hat Security Advisory: thunderbird security update
Multiple security vulnerabilities affecting Mozilla Thunderbird as packaged by Red Hat Enterprise Linux 8.4 have been addressed in an important security update. The issues include race conditions, use-after-free bugs, mitigation bypasses, same-origin policy bypasses, spoofing, and incorrect boundary conditions across various components such as DOM, Audio/Video, WebAssembly, WebRTC, and Graphics. Red Hat has released updated Thunderbird packages to fix these vulnerabilities.
AI Analysis
Technical Summary
This advisory covers a set of nine security vulnerabilities in Mozilla Thunderbird related to Firefox components, including race conditions (CVE-2025-13012), mitigation bypasses in DOM security components (CVE-2025-13013, CVE-2025-13018), use-after-free bugs in Audio/Video and WebRTC components (CVE-2025-13014, CVE-2025-13020), same-origin policy bypasses in DOM Workers and Notifications components (CVE-2025-13017, CVE-2025-13019), a spoofing issue (CVE-2025-13015), and incorrect boundary conditions in the JavaScript WebAssembly component (CVE-2025-13016). These vulnerabilities affect the Thunderbird package distributed with Red Hat Enterprise Linux 8.4 Extended Update Support and AUS. Red Hat has issued updated packages to remediate these issues.
Potential Impact
The vulnerabilities collectively could allow attackers to bypass security mitigations, execute use-after-free exploits potentially leading to arbitrary code execution or crashes, bypass same-origin policy restrictions, cause race conditions affecting graphics rendering, and perform spoofing attacks. The overall security impact is rated as Important by Red Hat, indicating a high potential risk to confidentiality, integrity, or availability if exploited.
Mitigation Recommendations
Red Hat has released updated Thunderbird packages for Red Hat Enterprise Linux 8.4 Extended Update Support and AUS that address these vulnerabilities. Users should apply the security update as detailed in Red Hat advisory RHSA-2025:22791 and the referenced article https://access.redhat.com/articles/11258. No additional mitigation steps are indicated beyond applying the official update.
Red Hat Security Advisory: thunderbird security update
Description
Multiple security vulnerabilities affecting Mozilla Thunderbird as packaged by Red Hat Enterprise Linux 8.4 have been addressed in an important security update. The issues include race conditions, use-after-free bugs, mitigation bypasses, same-origin policy bypasses, spoofing, and incorrect boundary conditions across various components such as DOM, Audio/Video, WebAssembly, WebRTC, and Graphics. Red Hat has released updated Thunderbird packages to fix these vulnerabilities.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This advisory covers a set of nine security vulnerabilities in Mozilla Thunderbird related to Firefox components, including race conditions (CVE-2025-13012), mitigation bypasses in DOM security components (CVE-2025-13013, CVE-2025-13018), use-after-free bugs in Audio/Video and WebRTC components (CVE-2025-13014, CVE-2025-13020), same-origin policy bypasses in DOM Workers and Notifications components (CVE-2025-13017, CVE-2025-13019), a spoofing issue (CVE-2025-13015), and incorrect boundary conditions in the JavaScript WebAssembly component (CVE-2025-13016). These vulnerabilities affect the Thunderbird package distributed with Red Hat Enterprise Linux 8.4 Extended Update Support and AUS. Red Hat has issued updated packages to remediate these issues.
Potential Impact
The vulnerabilities collectively could allow attackers to bypass security mitigations, execute use-after-free exploits potentially leading to arbitrary code execution or crashes, bypass same-origin policy restrictions, cause race conditions affecting graphics rendering, and perform spoofing attacks. The overall security impact is rated as Important by Red Hat, indicating a high potential risk to confidentiality, integrity, or availability if exploited.
Mitigation Recommendations
Red Hat has released updated Thunderbird packages for Red Hat Enterprise Linux 8.4 Extended Update Support and AUS that address these vulnerabilities. Users should apply the security update as detailed in Red Hat advisory RHSA-2025:22791 and the referenced article https://access.redhat.com/articles/11258. No additional mitigation steps are indicated 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-2025:22791
- Cve Count
- 9
- Additional Cves
- ["CVE-2025-13013","CVE-2025-13014","CVE-2025-13015","CVE-2025-13016","CVE-2025-13017","CVE-2025-13018","CVE-2025-13019","CVE-2025-13020"]
Threat ID: 6a419ca827e9c79719ab7aa8
Added to database: 06/28/2026, 22:14:00 UTC
Last enriched: 06/28/2026, 22:16:56 UTC
Last updated: 09/10/2026, 19:36:49 UTC
Views: 14
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