CVE-2025-8044
Critical
Description
Memory safety bugs present in Firefox 140 and Thunderbird 140. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 141 and Thunderbird 141.
SeverityCritical
CVSS9.8
Exploit probability—
Product
Mozilla Firefox
PublishedJul 22, 2025
First seenJul 22, 2025
Weakness typeCWE-119Memory buffer bounds error
How to fix
Update
- mozilla firefox141.0 or later
- mozilla thunderbird141.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla firefox | v < 141.0 | 141.0 |
| mozilla thunderbird | v < 141.0 | 141.0 |
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