| Package | Affected versions | Patched versions |
|---|---|---|
| firefox | < 82.0.3 | 82.0.3 |
| firefox esr | < 78.4.1 | 78.4.1 |
| thunderbird | < 78.4.2 | 78.4.2 |
In certain circumstances, the MCallGetProperty opcode can be emitted with unmet assumptions resulting in an exploitable use-after-free condition. This vulnerability affects Firefox < 82.0.3, Firefox ESR < 78.4.1, and Thunderbird < 78.4.2.
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