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CVE-2021-32810 — Vulnerability in crossbeam-deque — CVE Details

CRITICAL

crossbeam-deque Data Race before v0.7.4 and v0.8.1

Published August 25, 2021Updated July 8, 2026Source: osv

Summary

### Impact In the affected version of this crate, the result of the race condition is that one or more tasks in the worker queue can be popped twice instead of other tasks that are forgotten and never popped. If tasks are allocated on the heap, this can cause double free and a memory leak. If not, this still can cause a logical bug. Crates using `Stealer::steal`, `Stealer::steal_batch`, or `Stealer::steal_batch_and_pop` are affected by this issue. ### Patches This has been fixed in crossbeam-deque 0.8.1 and 0.7.4. ### Credits This issue was reported and fixed by Maor Kleinberger. ### License This advisory is in the public domain.

Advisory Timeline

  • First published August 25, 2021 (1874 days ago).
  • Last revised July 8, 2026 — 1777 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Cargo
Update crossbeam-deque to 0.7.4 or later
cargo update -p crossbeam-deque --precise 0.7.4
Cargo
Update crossbeam-deque to 0.8.1 or later
cargo update -p crossbeam-deque --precise 0.8.1

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (2)

Affects 1 ecosystem: crates.io (1).

PackageEcosystemAffectedFixed In
crossbeam-deque
crates.io
All versions0.7.4
crossbeam-deque
crates.io
All versions0.8.1

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.8 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

References

Frequently Asked Questions

What is CVE-2021-32810?
crossbeam-deque Data Race before v0.7.4 and v0.8.1 This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.8/10).
How do I check if my project is affected by CVE-2021-32810?
CVE-2021-32810 affects crossbeam-deque. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2021-32810 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
9.8

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

GHSA-pqqp-xmhj-wgcw
RUSTSEC-2021-0093

Related CVEs

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