CVE-2022-31621 Denial of service in n/a
Local users can cause a denial of service in MariaDB Server via a deadlock in xbstream_open due to improper lock release.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-31621?
CVE-2022-31621 is a medium-severity denial of service vulnerability in Mariadb Mariadb, published on 25 May 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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.
Weakness: CWE-667
Which versions are affected by CVE-2022-31621?
3 open source packages ship an affected version, including mariadb, mariadb-min and mysql-client. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
mariadb Bitnami | All versions | 10.2.41, 10.3.32, 10.4.22, 10.5.13, 10.6.5 |
mariadb-min Bitnami | All versions | 10.2.41, 10.3.32, 10.4.22, 10.5.13, 10.6.5 |
mysql-client Bitnami | All versions | 10.2.41, 10.3.32, 10.4.22, 10.5.13, 10.6.5 |
Products include Mariadb Mariadb.
How do I fix CVE-2022-31621?
Upgrade mariadb to a fixed version for your release line: 10.2.41, 10.3.32, 10.4.22 or 10.5.13.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2022-31621 being exploited?
There is no known exploitation of CVE-2022-31621 in the wild and no public exploit code.
Other vulnerabilities in Mariadb Mariadb
- CVE-2026-49261 MariaDB server has unsafe parameter handling in `wsrep_notify_cmd`
- CVE-2026-85746 MariaDB: Out-of-bound buffer write on in `ST_AsText` of nested GeometryCollections
- CVE-2026-85748 MariaDB: Use-after-free with a large number of SYS_REFCURSOR's
- CVE-2026-92262 MariaDB: Numerous issues caused by historical #mysql50# tablename encoding bypass.
- CVE-2023-26785 Code injection in n/a
Sources
Also known as ALPINE-CVE-2022-31621, BIT-mariadb-2022-31621, BIT-mariadb-min-2022-31621, BIT-mysql-client-2022-31621, DEBIAN-CVE-2022-31621, GHSA-vx82-3vmh-hc4q.