CVE-2026-85748

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.

Score

CVSS 3.1 9.9 Critical

Status

Analyzed - security-advisories@github.com

Published

2026-10-16

Last modified

2026-10-20

Weaknesses

CWE-416

Affected products

• Mariadb (Mariadb)
• Server (Mariadb)

References

• https://github.com/MariaDB/server/security/advisories/GHSA-mv8g-9f7q-hprm
• https://github.com/MariaDB/server/commit/91156c3de58762196605150ab3f756fe952592d1
• https://github.com/MariaDB/server/commit/9b075b2cb53338f67e7230cc585e02d2d34514ed
• 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