Uninitialized memory in a canvas object could have caused an incorrect free() leading to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 78.13, Thunderbird < 91, Firefox ESR < 78.13, and Firefox < 91.
The product does not initialize a critical resource.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Firefox | Mozilla | * | 91.0 (excluding) |
| Firefox_esr | Mozilla | * | 78.13.0 (excluding) |
| Thunderbird | Mozilla | * | 78.13.0 (excluding) |