CVE-2022-31146

CVE-2022-31146 affects Wasmtime (Cranelift) in the migration to the regalloc2 allocator (Wasmtime 0.37.0). The bug may cause metadata for reference-typed functions to be missing during GC, making the GC pass think there are no live references, leading to use-after-free when values are later acces...

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...