RUSTSEC-2026-0306 `hex_decode_unchecked` AVX2 path reads past `src`

fasterhex::hexdecodeunchecked is a safe function. On x86 and x8664, when AVX2 is enabled, hexdecodeavx2 keeps decoding while dst.len = 32 and then loads 32 bytes from src and 32 bytes from src32... Nothing in that loop requires src to contain 64 bytes. A safe caller can pass a short src and a dst...

`hex_decode_unchecked` AVX2 path reads past `src`

fasterhex::hexdecodeunchecked is a safe function. On x86 and x8664, when AVX2 is enabled, hexdecodeavx2 keeps decoding while dst.len = 32 and then loads 32 bytes from src and 32 bytes from src32... Nothing in that loop requires src to contain 64 bytes. A safe caller can pass a short src and a dst...