| Package | Affected versions | Patched versions |
|---|---|---|
| firefox | < 91.0 | 91.0 |
| thunderbird | < 91.0 | 91.0 |
Due to incorrect JIT optimization, we incorrectly interpreted data from the wrong type of object, resulting in the potential leak of a single bit of memory. This vulnerability affects Firefox < 91 and Thunderbird < 91.
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