UBUNTU-CVE-2021-3667

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    UBUNTU-CVE-2021-3667

    Published: 2 Mar 2022Last Modified: 22 Apr 2026
    Upstream:
    CVE-2021-3667
    Aliases:
    USN-5399-1

    Summary:

    Details: 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.

    References: https://ubuntu.com/security/CVE-2021-3667, https://ubuntu.com/security/notices/USN-5399-1, https://www.cve.org/CVERecord?id=CVE-2021-3667

    Affected packages

    Package

    Name: libvirt

    Purl: pkg:deb/ubuntu/[email protected]?arch=source&distro=focal

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -6.0.0-0ubuntu8.16

    Affected versions

    5.4.0-0ubuntu5

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    UBUNTU-CVE-2021-3667 | CVE-DB