CVSS 3.1 Score 5.3 of 10 (medium)


Published Sep 15, 2023
Updated: Sep 21, 2023
CWE ID 193


CVE-2023-41880 is a vulnerability found in Wasmtime, a standalone runtime for WebAssembly. Specifically, versions 10.0.0 to 10.02, 11.0.2, and 12.0.1 are affected on x86_64 platforms. When the shift amount is a constant value greater than 32, the `i64x2.shr_s` instruction miscompiles and produces an incorrect result, affecting the low 32-bits of the second lane of the vector. This issue does not allow for an escape from the WebAssembly sandbox and does not impact memory sandboxing or isolation from the host. However, any WebAssembly program utilizing `i64x2.shr_s` with a constant shift amount larger than 32 may produce incorrect results. The vulnerability has been rated as medium severity with a base score of 5.3 and an exploitability score of 3.9 by [email protected].


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