GHSA-qc84-gqf4-9926

Source

https://github.com/advisories/GHSA-qc84-gqf4-9926

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/02/GHSA-qc84-gqf4-9926/GHSA-qc84-gqf4-9926.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-qc84-gqf4-9926

Aliases

Published

2022-02-16T22:36:21Z

Modified

2025-02-04T17:30:19Z

Severity

8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator

Summary

crossbeam-utils Unsoundness of AtomicCell<{i,u}64> arithmetics on 32-bit targets that support Atomic{I,U}64

Details

Impact

The affected versions of this crate 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 the following problems:

Unaligned memory accesses
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. 32-bit targets with Atomic{I,U}64 and {i,u}64 have the same alignment are also not affected by this issue.

The following is a complete list of the builtin targets that may be affected. (last update: nightly-2022-02-11)

armv7-apple-ios (tier 3)
armv7s-apple-ios (tier 3)
i386-apple-ios (tier 3)
i586-unknown-linux-gnu
i586-unknown-linux-musl
i686-apple-darwin (tier 3)
i686-linux-android
i686-unknown-freebsd
i686-unknown-haiku (tier 3)
i686-unknown-linux-gnu
i686-unknown-linux-musl
i686-unknown-netbsd (tier 3)
i686-unknown-openbsd (tier 3)
i686-wrs-vxworks (tier 3)

(script to get list)

Patches

This has been fixed in crossbeam-utils 0.8.7.

Affected 0.8.x releases have been yanked.

References

https://github.com/crossbeam-rs/crossbeam/pull/781

License

This advisory is in the public domain.

Database specific

{
    "cwe_ids": [
        "CWE-362"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2022-02-16T22:36:21Z",
    "severity": "HIGH",
    "nvd_published_at": "2022-02-15T19:15:00Z"
}

References

Affected packages

crates.io / crossbeam-utils

Package

Name: crossbeam-utils; View open source insights on deps.dev
Purl: pkg:cargo/crossbeam-utils

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

0.8.7