CVE-2026-85745 MariaDB: Out-of-bound buffer read on in `ST_Area` of a multipolygon.
A low-privileged remote attacker can read out-of-bounds memory via malformed spatial data in MariaDB, potentially bypassing ASLR.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-85745?
CVE-2026-85745 is a medium-severity vulnerability in Mariadb Mariadb, published on 16 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
MariaDB server is a community developed fork of MySQL server. From 10.6.1 until 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, and 13.0.2, ST_Area reads beyond the allocated buffer when processing invalid WKB for a MultiPolygon because the multi-polygon parser advances past a nested geometry header without first verifying enough input remains. A low-privileged remote attacker can supply malformed spatial data to disclose memory useful for bypassing ASLR as part of a multi-vulnerability chain. This issue is fixed in versions 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, and 13.0.2.
Weakness: CWE-126
Which versions are affected by CVE-2026-85745?
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 | From 10.6.1 | 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, 13.0.2 |
mariadb-min Bitnami | From 10.6.1 | 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, 13.0.2 |
mysql-client Bitnami | From 10.6.1 | 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, 13.0.2 |
Products include Mariadb Mariadb.
How do I fix CVE-2026-85745?
Upgrade mariadb to a fixed version for your release line: 10.6.28, 10.11.19, 11.4.13 or 11.8.9.
Is CVE-2026-85745 being exploited?
There is no known exploitation of CVE-2026-85745 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 BELL-CVE-2026-85745, BIT-mariadb-2026-85745, BIT-mariadb-min-2026-85745, BIT-mysql-client-2026-85745, DEBIAN-CVE-2026-85745, ECHO-12c3-5dd3-b46c and 2 more.