MariaDB Server before 10.7 is vulnerable to Denial of Service. In extra/mariabackup/ds_xbstream.cc, when an error occurs (stream_ctxt->dest_file == NULL) while executing the method xbstream_open, the held lock is not released correctly, which allows local users to trigger a denial of service due to the deadlock. Note: The vendor argues this is just an improper locking bug and not a vulnerability with adverse effects.
https://security.netapp.com/advisory/ntap-20220707-0006/
https://jira.mariadb.org/browse/MDEV-26574?filter=-2
https://jira.mariadb.org/browse/MDEV-26574
https://jira.mariadb.org/browse/MDEV-26561
https://github.com/MariaDB/server/commit/b1351c15946349f9daa7e5297fb2ac6f3139e4a8