GHSA-gq4h-f254-7cw9: Data races in ticketed_lock

August 25, 2021 (updated June 13, 2023)

Affected versions of this crate unconditionally implemented Send for ReadTicket<T> & WriteTicket<T>. This allows to send non-Send T to other threads.

This can allows creating data races by cloning types with internal mutability and sending them to other threads (as T of ReadTicket<T>/WriteTicket<T>). Such data races can cause memory corruption or other undefined behavior.

The flaw was corrected in commit a986a93 by adding T: Send bounds to Send impls of ReadTicket<T>/WriteTicket<T>.

References

github.com/advisories/GHSA-gq4h-f254-7cw9
github.com/kvark/ticketed_lock/commit/a986a9335d591fa5c826157d1674d47aa525357f
github.com/kvark/ticketed_lock/issues/7
rustsec.org/advisories/RUSTSEC-2020-0119.html

Code Behaviors & Features

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