Vulnerability in Crossbeam Project
CVE-2022-23639
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.
Vulnerability class: Race Condition
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.012 (67.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 67.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: -0.000
Affected products
- Crossbeam Project
- Crossbeam-Rs Crossbeam — versions < 0.8.7
Weakness classification (CWE)
References
- github.com/crossbeam-rs/crossbeam/security/advisories/GHSA-qc84-gqf4-9926 (Exploit, Third Party Advisory)
- github.com/crossbeam-rs/crossbeam/pull/781 (Patch, Third Party Advisory, Issue Tracking)
- github.com/crossbeam-rs/crossbeam/releases/tag/crossbeam-utils-0.8.7 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2022-23639?
- CVE-2022-23639 is a high-severity vulnerability in Crossbeam Project, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 8.1/10. Published 2022-02-15.
- How severe is CVE-2022-23639?
- High severity. CVSS v3 base score is 8.1 out of 10.