https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-q49f-xg75-m9xw reports:
Wasmtime is a runtime for WebAssembly. From 25.0.0 to before 36.0.7,
42.0.2, and 43.0.1, Wasmtime's Winch compiler contains a vulnerability
where the compilation of the table.fill instruction can result in
a host panic. This means that a valid guest can be compiled with
Winch, on any architecture, and cause the host to panic. This
represents a denial-of-service vulnerability in Wasmtime due to
guests being able to trigger a panic. The specific issue is that
a historical refactoring changed how compiled code referenced tables
within the table.* instructions. This refactoring forgot to update
the Winch code paths associated as well, meaning that Winch was
using the wrong indexing scheme. Due to the feature support of
Winch the only problem that can result is tables being mixed up or
nonexistent tables being used, meaning that the guest is limited
to panicking the host (using a nonexistent table), or executing
spec-incorrect behavior and modifying the wrong table. This
vulnerability is fixed in crate versions: 36.0.7, 42.0.2, and 43.0.1.