CVE-2026-85748
Published: October 17, 2026Last modified: October 20, 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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 9.9 |
| Attack Vector | NETWORK |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | CHANGED |
| Confidentiality | HIGH |
| Integrity impact | HIGH |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | mariadb | Not affected (10.6.12-r0) |
| 25 LTS | mariadb | Not affected (11.4.5-r0) | |
| Stream | mariadb | Not affected (10.11.4-r0) |
References
- 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://github.com/MariaDB/server/security/advisories/GHSA-mv8g-9f7q-hprm
- https://jira.mariadb.org/browse/MDEV-40396
- https://jira.mariadb.org/browse/MDEV-40639