CVE-2020-26950
High
Description
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.
SeverityHigh
CVSS8.8
Exploit probability—
Product
Mozilla Firefox
PublishedDec 9, 2020
First seenDec 9, 2020
How to fix
Update
- mozilla firefox82.0.3 or later
- mozilla firefox_esr78.4.1 or later
- mozilla thunderbird78.4.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla firefox | v < 82.0.3 | 82.0.3 |
| mozilla firefox_esr | v < 78.4.1 | 78.4.1 |
| mozilla thunderbird | v < 78.4.2 | 78.4.2 |
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