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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

References

Timeline

  1. Published
  2. Last modified

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