CVE-2026-85748
MariaDB: Use-after-free with a large number of SYS_REFCURSOR's
CVSS Score
9.9
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-416 |
| Vendor | mariadb |
| Product | server |
| Published | Oct 16, 2026 |
| Last Updated | Oct 16, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
MariaDB / server
>= 12.3.1, < 12.3.3 >= 13.0.1, < 13.0.2
References
github.com: https://github.com/MariaDB/server/security/advisories/GHSA-mv8g-9f7q-hprm github.com: https://github.com/MariaDB/server/commit/91156c3de58762196605150ab3f756fe952592d1 github.com: https://github.com/MariaDB/server/commit/9b075b2cb53338f67e7230cc585e02d2d34514ed github.com: https://github.com/MariaDB/server/releases/tag/mariadb-12.3.3 github.com: https://github.com/MariaDB/server/releases/tag/mariadb-13.0.2 jira.mariadb.org: https://jira.mariadb.org/browse/MDEV-40396 jira.mariadb.org: https://jira.mariadb.org/browse/MDEV-40639