Vulnerability details
CVE-2026-85748
MariaDB server
MariaDB: Use-after-free with a large number of SYS_REFCURSOR's
CVSS 3.1
9.9Critical
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.9Critical | 3.1 | CVEProject cvelistV5 (CNA) (GitHub_M) | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| MariaDB | server | >= 12.3.1, < 12.3.3 | CVEProject cvelistV5 (CNA) |
| MariaDB | server | >= 13.0.1, < 13.0.2 | CVEProject cvelistV5 (CNA) |
References and advisories
7- https://github.com/MariaDB/server/security/advisories/GHSA-mv8g-9f7q-hprm x_refsource_CONFIRM
- https://github.com/MariaDB/server/commit/91156c3de58762196605150ab3f756fe952592d1 x_refsource_MISC
- https://github.com/MariaDB/server/commit/9b075b2cb53338f67e7230cc585e02d2d34514ed x_refsource_MISC
- https://github.com/MariaDB/server/releases/tag/mariadb-12.3.3 x_refsource_MISC
- https://github.com/MariaDB/server/releases/tag/mariadb-13.0.2 x_refsource_MISC
- https://jira.mariadb.org/browse/MDEV-40396 x_refsource_MISC
- https://jira.mariadb.org/browse/MDEV-40639 x_refsource_MISC
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Details
- Published
- 2026-10-16
- Last updated
- 2026-10-16
- State
- Published
- Assigner (CNA)
- GitHub_M
- Kolun priority
- 42 · Medium
Exploit prediction (EPSS)
1.17%
Probability of exploitation in 30 days
67.8%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-416Use After Free