The ruzstd vulnerability has now been fixed, affected versions have been yanked and an advisory has been created
https://rustsec.org/advisories/RUSTSEC-2024-0400.html
RUSTSEC-2024-0400: ruzstd: `ruzstd` uninit and out-of-bounds memory reads › RustSec Advisory Database

Security advisory database for Rust crates published through https://crates.io