{"cve":"CVE-2022-23639","nvd":{"published":"2022-02-15T19:15:08.340","modified":"2026-06-17T04:30:32.423","status":"Modified","description":"crossbeam-utils provides atomics, synchronization primitives, scoped threads, and other utilities for concurrent programming in Rust. crossbeam-utils prior to version 0.8.7 incorrectly assumed that the alignment of `{i,u}64` was always the same as `Atomic{I,U}64`. However, the alignment of `{i,u}64` on a 32-bit target can be smaller than `Atomic{I,U}64`. This can cause unaligned memory accesses and data race. Crates using `fetch_*` methods with `AtomicCell<{i,u}64>` are affected by this issue. 32-bit targets without `Atomic{I,U}64` and 64-bit targets are not affected by this issue. This has been fixed in crossbeam-utils 0.8.7. There are currently no known workarounds.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","score":8.1},"cwes":["CWE-362"],"references":["https://github.com/crossbeam-rs/crossbeam/pull/781","https://github.com/crossbeam-rs/crossbeam/releases/tag/crossbeam-utils-0.8.7","https://github.com/crossbeam-rs/crossbeam/security/advisories/GHSA-qc84-gqf4-9926","https://github.com/crossbeam-rs/crossbeam/pull/781","https://github.com/crossbeam-rs/crossbeam/releases/tag/crossbeam-utils-0.8.7"],"products":["crossbeam_project:crossbeam"],"source":"nvd","synced_at":"2026-10-19T21:28:04.509275555+00:00"},"epss":{"cve":"CVE-2022-23639","score":0.01229,"percentile":0.68918,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-qc84-gqf4-9926","url":"https://osv.dev/vulnerability/GHSA-qc84-gqf4-9926","summary":"crossbeam-utils Unsoundness of AtomicCell<{i,u}64> arithmetics on 32-bit targets that support Atomic{I,U}64","modified":"2025-02-04T17:30:19Z","packages":[{"ecosystem":"crates.io","name":"crossbeam-utils","purl":"pkg:cargo/crossbeam-utils","ranges":["<0.8.7"],"fixed":["0.8.7"]}]},{"id":"RUSTSEC-2022-0041","url":"https://osv.dev/vulnerability/RUSTSEC-2022-0041","summary":"Unsoundness of AtomicCell<*64> arithmetics on 32-bit targets that support Atomic*64","modified":"2026-07-17T16:00:03.387912841Z","packages":[{"ecosystem":"crates.io","name":"crossbeam-utils","purl":"pkg:cargo/crossbeam-utils","ranges":[">=0.0.0-0 <0.8.7"],"fixed":["0.8.7"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}