CVE-2026-85748
CRITICAL severity · CVSS 9.9 · Use-after-free
9.9CVSS CRITICAL
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)1%
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://github.com/MariaDB/server/commit/91156c3de58762196605150ab3f756fe952592d1 ↗
Additional information
- NVD record
- https://github.com/MariaDB/server/commit/91156c3de58762196605150ab3f756fe952592d1Patch
- https://github.com/MariaDB/server/commit/9b075b2cb53338f67e7230cc585e02d2d34514edPatch
- https://github.com/MariaDB/server/security/advisories/GHSA-mv8g-9f7q-hprmAdvisory
- https://github.com/MariaDB/server/releases/tag/mariadb-12.3.3
- https://github.com/MariaDB/server/releases/tag/mariadb-13.0.2
- https://jira.mariadb.org/browse/MDEV-40396
- https://jira.mariadb.org/browse/MDEV-40639