CVE-2022-31104

CVE-2022-31104 concerns Wasmtime’s x86_64 SIMD implementation. Two Cranelift lowering bugs affected i8x16.swizzle and select for v128 inputs: swizzle overwrote the mask input register, potentially corrupting a constant; and select incorrectly handled 128‑bit vectors when the condition was 0, movi...

CVE-2022-31169

CVE-2022-31169 affects Wasmtime’s Cranelift codegen on AArch64. A miscompilation in constant division may place incorrect values in registers due to sign/zero-extension rules, impacting WebAssembly sandbox correctness. Affected: Wasmtime prior to 0.38.2 and Cranelift prior to 0.85.2; fixed in Was...

CVE-2021-32629

Cranelift’s x64 backend bug in 0.73 (and certain earlier builds when the new backend is explicitly selected) can sign-extend a loaded i32 value, potentially enabling sandbox escapes in Wasm modules and exposing memory up to 2 GiB before the heap. Wasmtime and Lucet using Cranelift may be exploita...