GHSA-pg9f-39pc-qf8g

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Source
https://github.com/advisories/GHSA-pg9f-39pc-qf8g
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/04/GHSA-pg9f-39pc-qf8g/GHSA-pg9f-39pc-qf8g.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-pg9f-39pc-qf8g
Aliases
Downstream
Related
Published
2025-04-10T14:30:39Z
Modified
2025-10-28T06:29:00.070713Z
Severity
  • 6.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N CVSS Calculator
Summary
crossbeam-channel Vulnerable to Double Free on Drop
Details

The internal Channel type's Drop method has a race which could, in some circumstances, lead to a double-free. This could result in memory corruption.

Quoting from the upstream description in merge request #1187:

The problem lies in the fact that dicard_all_messages contained two paths that could lead to head.block being read but only one of them would swap the value. This meant that dicard_all_messages could end up observing a non-null block pointer (and therefore attempting to free it) without setting head.block to null. This would then lead to Channel::drop making a second attempt at dropping the same pointer.

The bug was introduced while fixing a memory leak, in upstream MR #1084, first published in 0.5.12.

The fix is in upstream MR #1187 and has been published in 0.5.15

Database specific 
{
    "github_reviewed": true,
    "cwe_ids": [
        "CWE-415"
    ],
    "github_reviewed_at": "2025-04-10T14:30:39Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
}
References

Affected packages

crates.io / crossbeam-channel

Package

Name
crossbeam-channel
View open source insights on deps.dev
Purl
pkg:cargo/crossbeam-channel

Affected ranges

Type
SEMVER
Events
Introduced
0.5.12
Fixed
0.5.15