Code injection

wasmtime is a fast and secure runtime for WebAssembly. Wasmtime's code generation backend, Cranelift, has a bug on x8664 platforms for the WebAssembly i8x16.select instruction which will produce the wrong results when the same operand is provided to the instruction and some of the selected indice...

CVE-2023-27477

Wasmtime Cranelift on x86_64 has a codegen bug for i8x16.select that can yield incorrect results when the same operand is used and some selected indices exceed 16. The off-by-one error in the mask calculation for pshufb may cause wrong results when lanes are taken from the second vector. This iss...

CVE-2022-31104 Miscompilation of `i8x16.swizzle` and `select` with v128 inputs in Wasmtime

Wasmtime is a standalone runtime for WebAssembly. In affected versions wasmtime's implementation of the SIMD proposal for WebAssembly on x8664 contained two distinct bugs in the instruction lowerings implemented in Cranelift. The aarch64 implementation of the simd proposal is not affected. The bu...