When reading from areas partially or fully outside the source resource with WebGLs copyTexSubImage method, the specification requires the returned values be zero. Previously, this memory was uninitialized, leading to potentially sensitive data disclosure. This vulnerability affects Thunderbird < 68.7.0, Firefox ESR < 68.7, and Firefox < 75.
The product uses or accesses a resource that has not been initialized.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Firefox | Mozilla | * | 75.0 (excluding) |
| Firefox_esr | Mozilla | * | 68.7.0 (excluding) |
| Thunderbird | Mozilla | * | 68.7.0 (excluding) |