Red Hat Security Advisory: thunderbird security update
Multiple security vulnerabilities affecting Mozilla Thunderbird, as packaged by Red Hat, have been addressed in a security update. These include issues such as race conditions, use-after-free, mitigation bypasses, same-origin policy bypasses, and spoofing vulnerabilities in various Firefox components integrated into Thunderbird. The update is rated as important by Red Hat Product Security and affects Red Hat Enterprise Linux 9 and its Extended Update Support versions. The advisory references nine CVEs related to Firefox components used by Thunderbird. No CVSS scores are provided in the advisory.
AI Analysis
Technical Summary
This Red Hat security advisory addresses nine 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 vulnerabilities in Audio/Video and WebRTC components (CVE-2025-13014, CVE-2025-13020), incorrect boundary conditions in JavaScript WebAssembly (CVE-2025-13016), same-origin policy bypasses in DOM Workers and Notifications components (CVE-2025-13019, CVE-2025-13017), and a spoofing issue (CVE-2025-13015). These vulnerabilities collectively impact the security posture of Thunderbird as distributed in Red Hat Enterprise Linux 9. The advisory provides updated Thunderbird packages to remediate these issues.
Potential Impact
The vulnerabilities include memory corruption (use-after-free), race conditions, security mitigation bypasses, same-origin policy bypasses, and spoofing issues, which could potentially allow attackers to bypass security controls, execute arbitrary code, or spoof content within Thunderbird. The advisory rates the overall impact as important, indicating a high security risk if unpatched. However, no known exploits in the wild are reported at this time.
Mitigation Recommendations
Red Hat has released updated Thunderbird packages for Red Hat Enterprise Linux 9 and its Extended Update Support versions that address these vulnerabilities. Users should apply the provided security update as detailed in the Red Hat advisory RHSA-2025:21842. For update instructions, refer to 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, have been addressed in a security update. These include issues such as race conditions, use-after-free, mitigation bypasses, same-origin policy bypasses, and spoofing vulnerabilities in various Firefox components integrated into Thunderbird. The update is rated as important by Red Hat Product Security and affects Red Hat Enterprise Linux 9 and its Extended Update Support versions. The advisory references nine CVEs related to Firefox components used by Thunderbird. No CVSS scores are provided in the advisory.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This Red Hat security advisory addresses nine 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 vulnerabilities in Audio/Video and WebRTC components (CVE-2025-13014, CVE-2025-13020), incorrect boundary conditions in JavaScript WebAssembly (CVE-2025-13016), same-origin policy bypasses in DOM Workers and Notifications components (CVE-2025-13019, CVE-2025-13017), and a spoofing issue (CVE-2025-13015). These vulnerabilities collectively impact the security posture of Thunderbird as distributed in Red Hat Enterprise Linux 9. The advisory provides updated Thunderbird packages to remediate these issues.
Potential Impact
The vulnerabilities include memory corruption (use-after-free), race conditions, security mitigation bypasses, same-origin policy bypasses, and spoofing issues, which could potentially allow attackers to bypass security controls, execute arbitrary code, or spoof content within Thunderbird. The advisory rates the overall impact as important, indicating a high security risk if unpatched. However, no known exploits in the wild are reported at this time.
Mitigation Recommendations
Red Hat has released updated Thunderbird packages for Red Hat Enterprise Linux 9 and its Extended Update Support versions that address these vulnerabilities. Users should apply the provided security update as detailed in the Red Hat advisory RHSA-2025:21842. For update instructions, refer to 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-2025:21842
- 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: 6a419caa27e9c79719ab8995
Added to database: 06/28/2026, 22:14:02 UTC
Last enriched: 06/28/2026, 22:19:28 UTC
Last updated: 09/10/2026, 19:36:49 UTC
Views: 18
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