CVE-2025-1933
High
Description
On 64-bit CPUs, when the JIT compiles WASM i32 return values they can pick up bits from left over memory. This can potentially cause them to be treated as a different type. This vulnerability was fixed in Firefox 136, Firefox ESR 115.21, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.
SeverityHigh
CVSS7.6
Exploit probability—
Product
Mozilla Firefox
PublishedMar 4, 2025
First seenMar 4, 2025
How to fix
Update
- mozilla firefox115.21.0, 136.0, 128.8.0 or later
- mozilla thunderbird128.8, 136.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla firefox | v < 115.21.0, v < 136.0, 116.0 ≤ v < 128.8.0 | 115.21.0, 136.0, 128.8.0 |
| mozilla thunderbird | v < 128.8, 129.0 ≤ v < 136.0 | 128.8, 136.0 |
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