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CVE-2025-1933

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CVE-2025-1933

Published: Mar 4, 2025

Modified: Apr 13, 2026

PUBLISHED

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.

VendorProductVersions

Mozilla

Firefox

unaffected
115.21 - <= 115.*
unaffected
128.8 - <= 128.*
unaffected
136 - <= *

Mozilla

Thunderbird

unaffected
128.8 - <= 128.*
unaffected
136 - <= *

References

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