GHSA-rjhf-4mh8-9xjq

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GHSA-rjhf-4mh8-9xjq

Summary: Zerocopy: Some Ref methods are unsound with some type parameters

Details: The `Ref` methods `into_ref`, `into_mut`, `into_slice`, and `into_slice_mut` are unsound and may allow safe code to exhibit undefined behavior when used with `Ref<B, T>` where `B` is [`cell::Ref`](https://doc.rust-lang.org/core/cell/struct.Ref.html) or [`cell::RefMut`](https://doc.rust-lang.org/core/cell/struct.RefMut.html). Note that these methods remain sound when used with `B` types other than `cell::Ref` or `cell::RefMut`. See https://github.com/google/zerocopy/issues/716 for a more in-depth analysis. The current plan is to yank the affected versions soon. See https://github.com/google/zerocopy/issues/679 for more detail.

References: https://github.com/google/zerocopy/issues/679, https://github.com/google/zerocopy/issues/71, https://github.com/google/zerocopy/issues/716, https://github.com/google/zerocopy, https://rustsec.org/advisories/RUSTSEC-2023-0074.html