CVE-2026-85748

CRITICAL 9.9CVE-2026-85748 · Published 16/10/2026 · updated 20/10/2026

Package	Affected versions	Patched versions
mariadb mariadb	`= 13.0.1≥ 12.3.1, < 12.3.3`	`12.3.3`

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.

References

MariaDB/server commit 91156c3 · Patch
MariaDB/server commit 9b075b2 · Patch
MariaDB/server release mariadb-12.3.3 · Release Notes
MariaDB/server release mariadb-13.0.2 · Release Notes
MariaDB/server security advisory · Vendor Advisory
jira.mariadb.org/browse/MDEV-40396 · Issue Tracking
jira.mariadb.org/browse/MDEV-40639 · Issue Tracking

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