CVE-2020-26974
High
Description
When flex-basis was used on a table wrapper, a StyleGenericFlexBasis object could have been incorrectly cast to the wrong type. This resulted in a heap user-after-free, memory corruption, and a potentially exploitable crash. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.
SeverityHigh
CVSS8.8
Exploit probability—
Product
Mozilla Firefox
PublishedJan 7, 2021
First seenJan 7, 2021
How to fix
Update
- mozilla firefox84.0 or later
- mozilla firefox_esr78.6.0 or later
- mozilla thunderbird78.6.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla firefox | v < 84.0 | 84.0 |
| mozilla firefox_esr | v < 78.6.0 | 78.6.0 |
| mozilla thunderbird | v < 78.6.0 | 78.6.0 |
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