CVE-2025-1012

high

Description

A race during concurrent delazification could have led to a use-after-free. This vulnerability affects Firefox < 135, Firefox ESR < 115.20, Firefox ESR < 128.7, Thunderbird < 128.7, and Thunderbird < 135.

References

https://www.mozilla.org/security/advisories/mfsa2025-11/

https://www.mozilla.org/security/advisories/mfsa2025-10/

https://www.mozilla.org/security/advisories/mfsa2025-09/

https://www.mozilla.org/security/advisories/mfsa2025-08/

https://www.mozilla.org/security/advisories/mfsa2025-07/

https://lists.debian.org/debian-lts-announce/2025/02/msg00006.html

https://lists.debian.org/debian-lts-announce/2025/02/msg00005.html

https://bugzilla.mozilla.org/show_bug.cgi?id=1939710

Details

Source: Mitre, NVD

Published: 2025-02-04

Updated: 2025-11-03

Risk Information

CVSS v2

Base Score: 7.6

Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H