A race during concurrent delazification could have led to a use-after-free. This vulnerability was fixed in Firefox 135, Firefox ESR 115.20, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.
References
| Link | Resource |
|---|---|
| https://bugzilla.mozilla.org/show_bug.cgi?id=1939710 | Permissions Required |
| https://www.mozilla.org/security/advisories/mfsa2025-07/ | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2025-08/ | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2025-09/ | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2025-10/ | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2025-11/ | Vendor Advisory |
| https://lists.debian.org/debian-lts-announce/2025/02/msg00005.html | |
| https://lists.debian.org/debian-lts-announce/2025/02/msg00006.html |
Configurations
Configuration 1 (hide)
|
History
05 Oct 2026, 15:10
| Type | Values Removed | Values Added |
|---|---|---|
| Summary | (es) Una ejecución durante la delazificación simultánea podría haber dado lugar a un uso después de la liberación. Esta vulnerabilidad afecta a Firefox menor que 135, Firefox ESR menor que 115.20, Firefox ESR menor que 128.7, Thunderbird menor que 128.7, y Thunderbird menor que 135. |
30 Sep 2026, 19:10
| Type | Values Removed | Values Added |
|---|---|---|
| Summary | (es) Una ejecución durante la delazificación simultánea podría haber dado lugar a un uso después de la liberación. Esta vulnerabilidad afecta a Firefox < 135, Firefox ESR < 115.20, Firefox ESR < 128.7, Thunderbird < 128.7, y Thunderbird < 135. |
Information
Published : 2025-02-04 14:15
Updated : 2026-10-05 15:10
NVD link : CVE-2025-1012
Mitre link : CVE-2025-1012
CVE.ORG link : CVE-2025-1012
JSON object : View
Products Affected
mozilla
- firefox
- thunderbird
CWE
CWE-416
Use After Free