During the worker lifecycle, a use-after-free condition could have occurred, which could have led to a potentially exploitable crash. This vulnerability affects Firefox < 115.0.2, Firefox ESR < 115.0.2, and Thunderbird < 115.0.1.
Fix
Patch, vendor advisory and mitigation references on NVD 6
- https://bugzilla.mozilla.org/show_bug.cgi?id=1839703 Issue Tracking, Permissions Required, Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-26/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-27/ Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1839703 Issue Tracking, Permissions Required, Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-26/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-27/ Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 8.8 · mozillaNVD modified 2026-10-23 23:10
Affected (CPE criteria) 3
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
References 6
- https://bugzilla.mozilla.org/show_bug.cgi?id=1839703 Issue Tracking, Permissions Required, Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-26/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-27/ Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1839703 Issue Tracking, Permissions Required, Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-26/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-27/ Vendor Advisory