VulnerabilityModified

CVE-2022-23639

HIGH 8.1EPSS 1.24%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (1.24%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

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 3.1: 8.1 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 1.24% probability · 67th percentile
CISA KEV: Not listed
Weakness: CWE-362
Affected: crossbeam project/crossbeam
Source: security-advisories@github.com

References

https://github.com/crossbeam-rs/crossbeam/pull/781Issue Tracking, Patch, Third Party Advisory
https://github.com/crossbeam-rs/crossbeam/releases/tag/crossbeam-utils-0.8.7Patch, Third Party Advisory
https://github.com/crossbeam-rs/crossbeam/security/advisories/GHSA-qc84-gqf4-9926Exploit, Third Party Advisory
https://github.com/crossbeam-rs/crossbeam/pull/781Issue Tracking, Patch, Third Party Advisory
https://github.com/crossbeam-rs/crossbeam/releases/tag/crossbeam-utils-0.8.7Patch, Third Party Advisory
https://github.com/crossbeam-rs/crossbeam/security/advisories/GHSA-qc84-gqf4-9926Exploit, Third Party Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.