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Double free in crossbeam

Critical severity GitHub Reviewed Published Aug 25, 2021 to the GitHub Advisory Database • Updated Nov 10, 2023

Package

cargo crossbeam (Rust)

Affected versions

>= 0.4.0, < 0.4.1

Patched versions

0.4.1

Description

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.

References

Published by the National Vulnerability Database Aug 26, 2019
Reviewed Aug 19, 2021
Published to the GitHub Advisory Database Aug 25, 2021
Last updated Nov 10, 2023

Severity

Critical
9.8
/ 10

CVSS base metrics

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

Weaknesses

CVE ID

CVE-2018-20996

GHSA ID

GHSA-c3cw-c387-pj65

Source code

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