CVE-2022-39394

Wasmtime is a standalone runtime for WebAssembly. Prior to version 2.0.2,
there is a bug in Wasmtime’s C API implementation where the definition of
the wasmtime_trap_code does not match its declared signature in the
wasmtime/trap.h header file. This discrepancy causes the function
implementation to perform a 4-byte write into a 1-byte buffer provided by
the caller. This can lead to three zero bytes being written beyond the
1-byte location provided by the caller. This bug has been patched and users
should upgrade to Wasmtime 2.0.2. This bug can be worked around by
providing a 4-byte buffer casted to a 1-byte buffer when calling
wasmtime_trap_code. Users of the wasmtime crate are not affected by
this issue, only users of the C API function wasmtime_trap_code are
affected.

Notes