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Vulnerability record · CVE-2021-3667 · published 2 March 2022

CVE-2021-3667: Redhat libvirt vulnerability

Redhat · Libvirt

An improper locking issue was found in the virStoragePoolLookupByTargetPath API of libvirt. It occurs in the storagePoolLookupByTargetPath function where a locked virStoragePoolObj object is not properly released on ACL permission failure. Clients connecting to the read-write socket with limited ACL permissions could use this flaw to acquire the lock and prevent other users from accessing storage pool/volume APIs, resulting in a denial of service condition. The highest threat from this vulnerability is to system availability.

6.5 CVSS 3.1 Medium EPSS 1.4% · top 29.3% CWE-667 · CWE-667
6.5CVSS 3.1 base score, v2 3.5
1.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
12References
17 Jun 2026Last modified by NVD

Description

An improper locking issue was found in the virStoragePoolLookupByTargetPath API of libvirt. It occurs in the storagePoolLookupByTargetPath function where a locked virStoragePoolObj object is not properly released on ACL permission failure. Clients connecting to the read-write socket with limited ACL permissions could use this flaw to acquire the lock and prevent other users from accessing storage pool/volume APIs, resulting in a denial of service condition. The highest threat from this vulnerability is to system availability.

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

Affected products

4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugzilla.redhat.com/show_bug.cgi?id=1986094 Issue TrackingVendor Advisory
https://gitlab.com/libvirt/libvirt/-/commit/447f69dec47e1b0bd15ecd7cd49a9fd3b050fb87 PatchThird Party Advisory
https://libvirt.org/git/?p=libvirt.git%3Ba=commit%3Bh=447f69dec47e1b0bd15ecd7cd49a9fd3b050fb87 Patch
https://lists.debian.org/debian-lts-announce/2024/04/msg00000.html Mailing ListThird Party Advisory
https://security.gentoo.org/glsa/202210-06 Third Party Advisory
https://security.netapp.com/advisory/ntap-20220331-0005/ Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1986094 Issue TrackingVendor Advisory
https://gitlab.com/libvirt/libvirt/-/commit/447f69dec47e1b0bd15ecd7cd49a9fd3b050fb87 PatchThird Party Advisory
https://libvirt.org/git/?p=libvirt.git%3Ba=commit%3Bh=447f69dec47e1b0bd15ecd7cd49a9fd3b050fb87 Patch
https://lists.debian.org/debian-lts-announce/2024/04/msg00000.html Mailing ListThird Party Advisory
https://security.gentoo.org/glsa/202210-06 Third Party Advisory
https://security.netapp.com/advisory/ntap-20220331-0005/ Third Party Advisory

Track CVE-2021-3667 inside VULONE

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Source: NIST National Vulnerability Database (record CVE-2021-3667), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.