7.6
High
CVE-2025-1933 On 64-bit CPUs, when the JIT compiles WASM i32 return values they can pick up bits from left over memory
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Firefox 136 | earliest → < 136 | 136 |
| Firefox 128.8 | earliest → < 128.8 | 128.8 |
| Firefox 115.21 | earliest → < 115.21 | 115.21 |
| Firefox ESR 128.8 | earliest → < 128.8 | 128.8 |
| Thunderbird 136 | earliest → < 136 | 136 |
| Thunderbird 128.8 | earliest → < 128.8 | 128.8 |
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