CVE-2020-36215: Data races in hashconsing

August 25, 2021 (updated June 13, 2023)

Affected versions of hashconsing implements Send/Sync for its HConsed type without restricting it to Sendable types and Syncable types. This allows non-Sync types such as Cell to be shared across threads leading to undefined behavior and memory corruption in concurrent programs.

References

github.com/AdrienChampion/hashconsing
github.com/AdrienChampion/hashconsing/issues/1
github.com/advisories/GHSA-rw2c-c256-3r53
nvd.nist.gov/vuln/detail/CVE-2020-36215
rustsec.org/advisories/RUSTSEC-2020-0107.html

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