CVE-2026-85748

9.9Critical

Published 16 Oct 2026 · NVD status: Awaiting Analysis · AI triage by gemini-3.8-flash

9.9Critical

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: None
Impact: Full C/I/A compromise
Weakness: CWE-416

Impact

Authenticated low-privileged attackers can trigger remote code execution or crash the server. They only need standard database credentials to open multiple cursors and fetch from them.

Root cause

Reallocating the SYS_REFCURSOR array leaves stale memory pointers inside routine execution contexts, leading to a use-after-free upon fetch.

Affected systems

MariaDB server versions 12.3.1 through versions prior to 12.3.3, and versions prior to 13.0.2.

CVSS v3.1 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Fix & remediation

Upgrade to MariaDB 12.3.3 or 13.0.2. No interim configuration workaround is provided, so restrict untrusted user access until the upgrade is complete.

shell

$ mariadb --version

AI-suggested. Run it in staging first and check it against the vendor advisory. Why?

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NVD 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.

References

Source: nvd.nist.gov/vuln/detail/CVE-2026-85748