Memory safety bug present in Firefox ESR 128.9, and Thunderbird 128.9. This bug showed evidence of memory corruption and we presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox ESR 128.10 and Thunderbird 128.10.
References
| Link | Resource |
|---|---|
| https://bugzilla.mozilla.org/show_bug.cgi?id=1894100 | Permissions Required |
| https://www.mozilla.org/security/advisories/mfsa2025-29/ | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2025-32/ | Vendor Advisory |
| https://lists.debian.org/debian-lts-announce/2025/05/msg00024.html |
Configurations
Configuration 1 (hide)
|
History
05 Oct 2026, 15:10
| Type | Values Removed | Values Added |
|---|---|---|
| Summary | (es) Error de seguridad de memoria presente en Firefox ESR 128.9 y Thunderbird 128.9. Este error mostró evidencia de corrupción de memoria y presumimos que, con suficiente esfuerzo, podría haberse explotado para ejecutar código arbitrario. Esta vulnerabilidad afecta a Firefox ESR menor que 128.10 y Thunderbird ESR menor que 128.10. |
30 Sep 2026, 18:10
| Type | Values Removed | Values Added |
|---|---|---|
| Summary | (es) Error de seguridad de memoria presente en Firefox ESR 128.9 y Thunderbird 128.9. Este error mostró evidencia de corrupción de memoria y presumimos que, con suficiente esfuerzo, podría haberse explotado para ejecutar código arbitrario. Esta vulnerabilidad afecta a Firefox ESR < 128.10 y Thunderbird ESR < 128.10. |
Information
Published : 2025-04-29 14:15
Updated : 2026-10-05 15:10
NVD link : CVE-2025-4093
Mitre link : CVE-2025-4093
CVE.ORG link : CVE-2025-4093
JSON object : View
Products Affected
mozilla
- firefox
- thunderbird
CWE
CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer