| Package | Affected versions | Patched versions |
|---|---|---|
| firefox | < 75.0 | 75.0 |
| firefox esr | < 68.7.0 | 68.7.0 |
| thunderbird | < 68.7.0 | 68.7.0 |
When reading from areas partially or fully outside the source resource with WebGL's <code>copyTexSubImage</code> 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.
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