CVE ID:	CVE-2020-15254
Description:	Crossbeam is a set of tools for concurrent programming. In crossbeam- channel before version 0.4.4, the bounded channel incorrectly assumes that `Vec::from_iter` has allocated capacity that same as the number of iterator elements. `Vec::from_iter` does not actually guarantee that and may allocate extra memory. The destructor of the `bounded` channel reconstructs `Vec` from the raw pointer based on the incorrect assumes described above. This is unsound and causing deallocation with the incorrect capacity when `Vec::from_iter` has allocated different sizes with the number of iterator elements. This has been fixed in crossbeam-channel 0.4.4.
Test IDs:	None available
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2020-15254 https://github.com/crossbeam-rs/crossbeam/security/advisories/GHSA-v5m7-53cv-f3hx https://github.com/RustSec/advisory-db/pull/425 https://github.com/RustSec/advisory-db/pull/425 https://github.com/crossbeam-rs/crossbeam/issues/539 https://github.com/crossbeam-rs/crossbeam/issues/539 https://github.com/crossbeam-rs/crossbeam/pull/533 https://github.com/crossbeam-rs/crossbeam/pull/533