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Test your applicationsUpgrade RHEL:8 virt:rhel/libvirt-devel to version 0:6.0.0-37.module+el8.5.0+12162+40884dd2 or higher.
This issue was patched in RHSA-2021:4191.
Note: Versions mentioned in the description apply only to the upstream virt:rhel/libvirt-devel package and not the virt:rhel/libvirt-devel package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
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.