CVE-2022-23639

HIGHNVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.1 under NVD CVSS v3. EPSS exploit probability: 1.2%, top 34% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.1Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
8.1
EG Score
8.1(medium)
EG Risk
52(Track*)
EG Risk 52/100SSVC: Track*

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity81% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
1%
EPSS %ILE
68%
KEV
Not listed

Published

February 15, 2022

Last Modified

November 21, 2024

Advisory Details (3)

Auto-updated Sep 18, 2026
Patch available. Sources: github, github_pr, github_release.
github Patch Available

Unsoundness of AtomicCell<{i,u}64> arithmetics on 32-bit targets that support Atomic{I,U}64 · Advisory · crossbeam-rs/crossbeam · GitHub

https://github.com/crossbeam-rs/crossbeam/security/advisories/GHSA-qc84-gqf4-9926
github_release Patch Available

crossbeam-utils 0.8.7

Patch available: crossbeam-rs/crossbeam crossbeam-utils-0.8.7

https://github.com/crossbeam-rs/crossbeam/releases/tag/crossbeam-utils-0.8.7
github_pr Patch Available

Fix unsoundness of AtomicCell<*64> arithmetics on 32-bit targets that support Atomic*64

Patch available: crossbeam-rs/crossbeam crossbeam-utils-0.8.18 (PR #781 merged 2022-02-05)

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

Vendor Advisories for CVE-2022-23639(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(5 across 5 ecosystems)
crates.io(1)
PackageVulnerable rangeFixed inDependents
crossbeam-utils—0.8.7—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
rust-crossbeam-utils0.7.2-2 ... 0.8.8-1 (9 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
rust-crossbeam-utils—0.8.8-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
rust-crossbeam-utils—0.8.8-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
rust-crossbeam-utils—0.8.8-1—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 3× in last 7d / 25× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 153 total refreshes for this CVE.

  1. 2026-09-17 19:23 UTCEPSS rescore
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  1. 2026-08-20 22:52 UTCEPSS rescore
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  28. 2026-07-23 02:08 UTCEG score recompute
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  75. 2026-06-21 01:58 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2022-23639?
CVE-2022-23639 is a high vulnerability published on February 15, 2022. 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…
When was CVE-2022-23639 disclosed?
CVE-2022-23639 was first published in the National Vulnerability Database on February 15, 2022, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2022-23639 actively exploited?
CVE-2022-23639 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 32.2% of all scored CVEs.
What is the CVSS score of CVE-2022-23639?
CVE-2022-23639 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2022-23639?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-23639, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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