Important: thunderbird security update
Mozilla Thunderbird is a standalone mail and newsgroup client. Security Fix(es): * firefox: thunderbird: Sandbox escape due to use-after-free in the Graphics: Canvas2D component (CVE-2025-10527) * firefox: thunderbird: Incorrect boundary conditions in the JavaScript: GC component (CVE-2025-10532) * firefox: thunderbird: Sandbox escape due to undefined behavior, invalid pointer in the Graphics: Canvas2D component (CVE-2025-10528) * firefox: thunderbird: Same-origin policy bypass in the Layout component (CVE-2025-10529) * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.3, Thunderbird ESR 140.3, Firefox 143 and Thunderbird 143 (CVE-2025-10537) * firefox: thunderbird: Information disclosure in the Networking: Cache component (CVE-2025-10536) * firefox: thunderbird: Integer overflow in the SVG component (CVE-2025-10533) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
02 / AFFECTED SOFTWARE
Affected packages
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
Mozilla Thunderbird is a standalone mail and newsgroup client. Security Fix(es): * firefox: thunderbird: Sandbox escape due to use-after-free in the Graphics: Canvas2D component (CVE-2025-10527) * firefox: thunderbird: Incorrect boundary conditions in the JavaScript: GC component (CVE-2025-10532) * firefox: thunderbird: Sandbox escape due to undefined behavior, invalid pointer in the Graphics: Canvas2D component (CVE-2025-10528) * firefox: thunderbird: Same-origin policy bypass in the Layout component (CVE-2025-10529) * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.3, Thunderbird ESR 140.3, Firefox 143 and Thunderbird 143 (CVE-2025-10537) * firefox: thunderbird: Information disclosure in the Networking: Cache component (CVE-2025-10536) * firefox: thunderbird: Integer overflow in the SVG component (CVE-2025-10533) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
05 / REFERENCES
Further evidence
- https://access.redhat.com/errata/RHSA-2025:16589
- https://access.redhat.com/security/cve/CVE-2025-10527
- https://access.redhat.com/security/cve/CVE-2025-10528
- https://access.redhat.com/security/cve/CVE-2025-10529
- https://access.redhat.com/security/cve/CVE-2025-10532
- https://access.redhat.com/security/cve/CVE-2025-10533
- https://access.redhat.com/security/cve/CVE-2025-10536
- https://access.redhat.com/security/cve/CVE-2025-10537
- https://bugzilla.redhat.com/2395745
- https://bugzilla.redhat.com/2395754
- https://bugzilla.redhat.com/2395755
- https://bugzilla.redhat.com/2395756
- https://bugzilla.redhat.com/2395759
- https://bugzilla.redhat.com/2395764
- https://bugzilla.redhat.com/2395766
- https://errata.almalinux.org/8/ALSA-2025-16589.html