Privilege escalation in the Graphics: WebRender component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.
Weakness
The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Firefox | Mozilla | * | 115.37.0 (excluding) |
| Firefox | Mozilla | * | 152.0 (excluding) |
| Firefox | Mozilla | 140.0 (including) | 140.12.0 (excluding) |
| Thunderbird | Mozilla | * | 152.0.0 (excluding) |
| Thunderbird | Mozilla | 140.0 (including) | 140.12.0 (excluding) |
| Red Hat Enterprise Linux 10 | RedHat | firefox-0:140.12.0-1.el10_2 | * |
| Red Hat Enterprise Linux 8 | RedHat | firefox-0:140.12.0-1.el8_10 | * |
| Red Hat Enterprise Linux 9 | RedHat | firefox-0:140.12.0-1.el9_8 | * |
| Mozjs102 | Ubuntu | esm-apps/noble | * |
| Mozjs102 | Ubuntu | jammy | * |
| Mozjs102 | Ubuntu | noble | * |
| Mozjs115 | Ubuntu | noble | * |
| Mozjs52 | Ubuntu | esm-apps/focal | * |
| Mozjs52 | Ubuntu | esm-infra/bionic | * |
| Mozjs68 | Ubuntu | esm-infra/focal | * |
| Mozjs78 | Ubuntu | esm-apps/jammy | * |
| Mozjs78 | Ubuntu | jammy | * |
| Mozjs91 | Ubuntu | jammy | * |
| Thunderbird | Ubuntu | jammy | * |
Potential Mitigations
Related Attack Patterns
- https://cwe.mitre.org/data/definitions/122.html
- https://cwe.mitre.org/data/definitions/233.html
- https://cwe.mitre.org/data/definitions/58.html
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2023443
- https://www.mozilla.org/security/advisories/mfsa2026-57/
- https://www.mozilla.org/security/advisories/mfsa2026-58/
- https://www.mozilla.org/security/advisories/mfsa2026-59/
- https://www.mozilla.org/security/advisories/mfsa2026-60/
- https://www.mozilla.org/security/advisories/mfsa2026-61/