The affected versions make unsafe memory accesses under the assumption that #[repr(packed)] has a guaranteed field order.

The Rust specification does not guarantee this, and rust-lang/rust#125360 (1.80.0-beta) starts
reordering fields of #[repr(packed)] structs, leading to illegal memory accesses.

The patched versions 0.9.7 and 0.10.4 use #[repr(C, packed)], which guarantees field order.

References

• https://rustsec.org/advisories/RUSTSEC-2024-0347.html