Vulnerability in crossbeam-utils (CVE-2022-23639)

Summary

Vulnerability in crossbeam-utils (CVE-2022-23639). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to 0.8.7 or later.

Original description

The description as published by the source.

Impact

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.

Thanks to @taiki-e.

Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as CVE-2022-23639 has been found in crossbeam-utils.
Risk of unauthorized operations or information disclosure.
What to do: upgrade crossbeam-utils to 0.8.7 or later.
If unsure, ask your IT team or search "crossbeam-utils CVE-2022-23639" on the vendor's site.

CVE-2022-23639 (crossbeam-utils)
Patched: 0.8.7 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.

❓ What is the problem

A vulnerability (unclassified) exists in crossbeam-utils.

📍 Affected scope

Check the vendor advisory for the affected versions of crossbeam-utils.

🔥 Severity

Severity: ?. Risk of unauthorized operations or information disclosure.

🔧 How to fix

Update to 0.8.7.

🛡️ Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

🔍 Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'crossbeam-utils' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

1
Identify exposure identify
```
grep -r 'crossbeam-utils' . | grep -v node_modules
```
リポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で crossbeam-utils を grep し、稼働しているサービス・バージョンを把握する。
2
Apply patch patch
```
Upgrade crossbeam-utils to 0.8.7
```
ステージング環境で 0.8.7 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
3
Post-deployment verification verify
```
Confirm patched version is live in production
```
パッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。

Affected packages

crates.io crossbeam-utils

[{"type":"SEMVER","events":[{"introduced":"0.0.0-0"},{"fixed":"0.8.7"}]}]

Fix status by distribution

Fixed packages published by each distribution for this CVE

Debian DEBIAN-CVE-2022-23639 rust-crossbeam-utils
Ubuntu UBUNTU-CVE-2022-23639 rustc

References

advisory rustsec.org
package crates.io
web github.com