{"id":"CVE-2022-23639","aliases":["GHSA-qc84-gqf4-9926","RUSTSEC-2022-0041"],"url":"https://o3.security/vulnerability/CVE-2022-23639","summary":"Improper Restriction of Operations within the Bounds of a Memory Buffer and Race Condition in crossbeam-utils","details":"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.","published":"2022-02-15T18:20:10Z","modified":"2026-08-12T03:51:40.959113206Z","cvss":{"score":8.1,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"crates.io","name":"crossbeam-utils","fixedVersion":"0.8.7"}],"fix":{"url":"https://github.com/crossbeam-rs/crossbeam/pull/781","label":"crossbeam-rs/crossbeam#781"},"references":[{"type":"WEB","url":"https://github.com/crossbeam-rs/crossbeam/releases/tag/crossbeam-utils-0.8.7"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/23xxx/CVE-2022-23639.json"},{"type":"ADVISORY","url":"https://github.com/crossbeam-rs/crossbeam/security/advisories/GHSA-qc84-gqf4-9926"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-23639"},{"type":"FIX","url":"https://github.com/crossbeam-rs/crossbeam/pull/781"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:40.959113206Z"}}