VULNERABILITY INTELLIGENCE

CVE-2025-1933

CVSS score7.6 HIGH

EPSS probability0.32%

CISA KEVNot currently listed

Published2025-03-04

Last modified2026-10-05

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.