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 affects Firefox < 136, Firefox ESR < 115.21, Firefox ESR < 128.8, Thunderbird < 136, and Thunderbird < 128.8.
Platform | Package | Release Date | Advisory |
---|---|---|---|
Amazon Linux 2 - Firefox Extra | firefox | 2025-03-26 19:21 | ALAS2FIREFOX-2025-036 |
Amazon Linux 2 - Core | thunderbird | 2025-03-26 19:24 | ALAS2-2025-2807 |
Score Type | Score | Vector | |
---|---|---|---|
Amazon Linux | CVSSv3 | 7.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H |