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CVE-2021-43539 Failure to correctly record the location of live pointers across wasm instance calls resulted in a GC occurring within…
Description
Failure to correctly record the location of live pointers across wasm instance calls resulted in a GC occurring within the call not tracing those live pointers. This could have led to a use-after-free causing a potentially exploitable crash. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Thunderbird 91.4 | earliest → < 91.4.0 | 91.4.0 |
| Firefox ESR 91.4 | earliest → < 91.4.0 | 91.4.0 |
| Firefox 95 | earliest → < 95 | 95 |
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