Description
MariaDB server is a community developed fork of MySQL server. From 12.3.1 until 12.3.3 and 13.0.2, SYS_REFCURSOR handling is affected because cursor-array reallocation can leave stale references in routine contexts. A low-privileged attacker can open a large number of SYS_REFCURSORs and then fetch one to trigger a use-after-free that can enable remote code execution when combined with another vulnerability. This issue is fixed in versions 12.3.3 and 13.0.2.
Affected products
mariadb: mariadb
References7
- github.com/MariaDB/server/security/advisories/GHSA-mv8g-9f7q-hp… Vendor Advisory
- github.com/MariaDB/server/commit/91156c3de58762196605150ab3f756… Patch
- github.com/MariaDB/server/commit/9b075b2cb53338f67e7230cc585e02… Patch
- github.com/MariaDB/server/releases/tag/mariadb-12.3.3 Release Notes
- github.com/MariaDB/server/releases/tag/mariadb-13.0.2 Release Notes
- jira.mariadb.org/browse/MDEV-40396 Issue Tracking
- jira.mariadb.org/browse/MDEV-40639 Issue Tracking
Metrics
- CVSS 3.1
-
9.9
CRITICAL
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H - EPSS — exploit probability
- 1% percentile: 68 · as of 10 November 2026
- CWE
- CWE-416
Could this be exploited in your environment?
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