| Package | Affected versions | Patched versions |
|---|---|---|
| firefox | < 91.0 | 91.0 |
| firefox esr | < 78.13.0 | 78.13.0 |
| thunderbird | < 78.13.0 | 78.13.0 |
A suspected race condition when calling getaddrinfo led to memory corruption and a potentially exploitable crash. *Note: This issue only affected Linux operating systems. Other operating systems are unaffected.* This vulnerability affects Thunderbird < 78.13, Thunderbird < 91, Firefox ESR < 78.13, and Firefox < 91.
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