{"id":"UBUNTU-CVE-2021-3667","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.","modified":"2026-04-22T14:51:37.473838Z","published":"2022-03-02T23:15:00Z","related":["USN-5399-1"],"upstream":["CVE-2021-3667"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-3667"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5399-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-3667"}],"affected":[{"package":{"name":"libvirt","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/libvirt@6.0.0-0ubuntu8.16?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.0-0ubuntu8.16"}]}],"versions":["5.4.0-0ubuntu5","6.0.0-0ubuntu1","6.0.0-0ubuntu2","6.0.0-0ubuntu3","6.0.0-0ubuntu4","6.0.0-0ubuntu5","6.0.0-0ubuntu6","6.0.0-0ubuntu7","6.0.0-0ubuntu8","6.0.0-0ubuntu8.1","6.0.0-0ubuntu8.2","6.0.0-0ubuntu8.3","6.0.0-0ubuntu8.4","6.0.0-0ubuntu8.5","6.0.0-0ubuntu8.7","6.0.0-0ubuntu8.8","6.0.0-0ubuntu8.9","6.0.0-0ubuntu8.10","6.0.0-0ubuntu8.11","6.0.0-0ubuntu8.12","6.0.0-0ubuntu8.13","6.0.0-0ubuntu8.14","6.0.0-0ubuntu8.15"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libnss-libvirt","binary_version":"6.0.0-0ubuntu8.16"},{"binary_name":"libvirt-clients","binary_version":"6.0.0-0ubuntu8.16"},{"binary_name":"libvirt-daemon","binary_version":"6.0.0-0ubuntu8.16"},{"binary_name":"libvirt-daemon-driver-lxc","binary_version":"6.0.0-0ubuntu8.16"},{"binary_name":"libvirt-daemon-driver-qemu","binary_version":"6.0.0-0ubuntu8.16"},{"binary_name":"libvirt-daemon-driver-storage-gluster","binary_version":"6.0.0-0ubuntu8.16"},{"binary_name":"libvirt-daemon-driver-storage-rbd","binary_version":"6.0.0-0ubuntu8.16"},{"binary_name":"libvirt-daemon-driver-storage-zfs","binary_version":"6.0.0-0ubuntu8.16"},{"binary_name":"libvirt-daemon-driver-vbox","binary_version":"6.0.0-0ubuntu8.16"},{"binary_name":"libvirt-daemon-driver-xen","binary_version":"6.0.0-0ubuntu8.16"},{"binary_name":"libvirt-daemon-system","binary_version":"6.0.0-0ubuntu8.16"},{"binary_name":"libvirt-daemon-system-systemd","binary_version":"6.0.0-0ubuntu8.16"},{"binary_name":"libvirt-daemon-system-sysv","binary_version":"6.0.0-0ubuntu8.16"},{"binary_name":"libvirt-sanlock","binary_version":"6.0.0-0ubuntu8.16"},{"binary_name":"libvirt-wireshark","binary_version":"6.0.0-0ubuntu8.16"},{"binary_name":"libvirt0","binary_version":"6.0.0-0ubuntu8.16"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-3667.json"}},{"package":{"name":"libvirt","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/libvirt@7.6.0-0ubuntu3?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.6.0-0ubuntu3"}]}],"versions":["7.6.0-0ubuntu1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libnss-libvirt","binary_version":"7.6.0-0ubuntu3"},{"binary_name":"libvirt-clients","binary_version":"7.6.0-0ubuntu3"},{"binary_name":"libvirt-daemon","binary_version":"7.6.0-0ubuntu3"},{"binary_name":"libvirt-daemon-config-network","binary_version":"7.6.0-0ubuntu3"},{"binary_name":"libvirt-daemon-config-nwfilter","binary_version":"7.6.0-0ubuntu3"},{"binary_name":"libvirt-daemon-driver-lxc","binary_version":"7.6.0-0ubuntu3"},{"binary_name":"libvirt-daemon-driver-qemu","binary_version":"7.6.0-0ubuntu3"},{"binary_name":"libvirt-daemon-driver-storage-gluster","binary_version":"7.6.0-0ubuntu3"},{"binary_name":"libvirt-daemon-driver-storage-iscsi-direct","binary_version":"7.6.0-0ubuntu3"},{"binary_name":"libvirt-daemon-driver-storage-rbd","binary_version":"7.6.0-0ubuntu3"},{"binary_name":"libvirt-daemon-driver-storage-zfs","binary_version":"7.6.0-0ubuntu3"},{"binary_name":"libvirt-daemon-driver-vbox","binary_version":"7.6.0-0ubuntu3"},{"binary_name":"libvirt-daemon-driver-xen","binary_version":"7.6.0-0ubuntu3"},{"binary_name":"libvirt-daemon-system","binary_version":"7.6.0-0ubuntu3"},{"binary_name":"libvirt-daemon-system-systemd","binary_version":"7.6.0-0ubuntu3"},{"binary_name":"libvirt-daemon-system-sysv","binary_version":"7.6.0-0ubuntu3"},{"binary_name":"libvirt-login-shell","binary_version":"7.6.0-0ubuntu3"},{"binary_name":"libvirt-sanlock","binary_version":"7.6.0-0ubuntu3"},{"binary_name":"libvirt-wireshark","binary_version":"7.6.0-0ubuntu3"},{"binary_name":"libvirt0","binary_version":"7.6.0-0ubuntu3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-3667.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"low"}]}