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CVE-2018-20996 — Double free in crossbeam — CVE Details

CRITICAL

Double free in crossbeam

Published August 25, 2021Updated November 8, 2023Source: osv

Summary

Even if an element is popped from a queue, crossbeam would run its destructor inside the epoch-based garbage collector. This is a source of double frees. The flaw was corrected by wrapping elements inside queues in a ManuallyDrop.

Advisory Timeline

  • First published August 25, 2021 (1874 days ago).
  • Last revised November 8, 2023 — 804 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Cargo
Update crossbeam to 0.4.1 or later
cargo update -p crossbeam --precise 0.4.1

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

Affected Packages (1)

Affects 1 ecosystem: crates.io (1).

PackageEcosystemAffectedFixed In
crossbeam
crates.io
All versions0.4.1

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

References

Frequently Asked Questions

What is CVE-2018-20996?
Double free in crossbeam 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-2018-20996?
CVE-2018-20996 affects crossbeam. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2018-20996 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-c3cw-c387-pj65
RUSTSEC-2018-0009

Related CVEs

More crates.io advisories

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