Vulnerability 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 Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Crossbeam Project | Crossbeam | < 0.8.7 |
Related Weaknesses (CWE)
References
- https://github.com/crossbeam-rs/crossbeam/pull/781Issue TrackingPatchThird Party Advisory
- https://github.com/crossbeam-rs/crossbeam/releases/tag/crossbeam-utils-0.8.7PatchThird Party Advisory
- https://github.com/crossbeam-rs/crossbeam/security/advisories/GHSA-qc84-gqf4-992ExploitThird Party Advisory
- https://github.com/crossbeam-rs/crossbeam/pull/781Issue TrackingPatchThird Party Advisory
- https://github.com/crossbeam-rs/crossbeam/releases/tag/crossbeam-utils-0.8.7PatchThird Party Advisory
- https://github.com/crossbeam-rs/crossbeam/security/advisories/GHSA-qc84-gqf4-992ExploitThird Party Advisory
FAQ
What is CVE-2022-23639?
CVE-2022-23639 is a vulnerability with a CVSS score of 8.1 (HIGH). 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 th...
How severe is CVE-2022-23639?
CVE-2022-23639 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-23639?
Check the references section above for vendor advisories and patch information. Affected products include: Crossbeam Project Crossbeam.