CVE-2022-23639 Information

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 iu64 was always the same as AtomicIU64. However the alignment of iu64 on a 32-bit target can be smaller than AtomicIU64. This can cause unaligned memory accesses and data race. Crates using fetch_ methods with AtomicCell<iu64> are affected by this issue. 32-bit targets without AtomicIU64 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 Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

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

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.1