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CVE-2021-43535 A use-after-free could have occured when an HTTP2 session object was released on a different thread, leading to memory…
Description
A use-after-free could have occured when an HTTP2 session object was released on a different thread, leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 93, Thunderbird < 91.3, and Firefox ESR < 91.3.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Firefox 93 | earliest → < 93 | 93 |
| Thunderbird 91.3 | earliest → < 91.3 | 91.3 |
| Firefox ESR 91.3 | earliest → < 91.3 | 91.3 |
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