CVE-2026-85748
MariaDB: Use-after-free with a large number of SYS_REFCURSOR's
- State
- Published
- Severity
- 9.9 Critical
- Published
- Oct 16, 2026
- Updated
- Oct 16, 2026
- Reserved
- Sep 4, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 9.9 Critical | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H | GitHub_M |
Weaknesses
- CWE-416 Use After Free
Affected Products
| Product | Versions |
|---|---|
serverMariaDB |
|
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
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