CVE-2025-1012
High
Description
A race during concurrent delazification could have led to a use-after-free. This vulnerability was fixed in Firefox 135, Firefox ESR 115.20, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Mozilla Firefox
PublishedFeb 4, 2025
First seenFeb 4, 2025
Weakness typeCWE-416Use after free
How to fix
Update
- mozilla firefox115.20.0, 135.0, 128.7.0 or later
- mozilla thunderbird135.0, 128.7.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla firefox | v < 115.20.0, v < 135.0, 128.1.0 ≤ v < 128.7.0 | 115.20.0, 135.0, 128.7.0 |
| mozilla thunderbird | v < 135.0, 128.0.1 ≤ v < 128.7.0 | 135.0, 128.7.0 |
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