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cnvd-2021-85283

An issue was discovered in the cgc crate through 2020-12-10 for Rust. Ptr implements Send and Sync for all types.

Affected: crates.io: cgc

An issue was discovered in the cgc crate through 2020-12-10 for Rust. Ptr implements Send and Sync for all types

Affected: crates.io: cgc

Affected versions of this crate have the following issues:

1. `Ptr` implements `Send` and `Sync` for all types, this can lead to data races by sending non-thread safe types across threads.

2. `Ptr::get` violates mutable alias rules by returning multiple mutable references to the same object.

3. `Ptr::write` uses non-atomic writes to the underlying pointer. This means that when used across threads it can lead to data races.