CVE-2021-38496
High
Description
During operations on MessageTasks, a task may have been removed while it was still scheduled, resulting in memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 78.15, Thunderbird < 91.2, Firefox ESR < 91.2, Firefox ESR < 78.15, and Firefox < 93.
SeverityHigh
CVSS8.8
Exploit probability—
Product
Mozilla Firefox
PublishedNov 3, 2021
First seenNov 3, 2021
How to fix
Update
- mozilla firefox93.0, 91.2 or later
- mozilla firefox_esr78.15 or later
- mozilla thunderbird78.15, 91.2 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla firefox | v < 93.0, 91.0 ≤ v < 91.2 | 93.0, 91.2 |
| mozilla firefox_esr | v < 78.15 | 78.15 |
| mozilla thunderbird | v < 78.15, 91.0 ≤ v < 91.2 | 78.15, 91.2 |
| debian debian_linux | 9.0, 10.0, 11.0 | — |
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