by Kastro
Paper/Archive/CVE-2026-85748

CVE-2026-85748

MariaDB server — MariaDB: Use-after-free with a large number of SYS_REFCURSOR's

EPSS 1%CVSS 9.9
critical.is priorityof 100
43
CVSS 9.9 (CNA)9.9 / 10 × 3029.7Not in CISA KEV+300.0EPSS percentile 67.6.676 × 2013.5No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
server>= 12.3.1, < 12.3.3–CNA
server>= 13.0.1, < 13.0.2–CNA

Scores by source

GitHub_M (CNA)9.9CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refgithub.com/MariaDB/server/security/advisories/GHSA-mv8g-9f7q-hprmrefgithub.com/MariaDB/server/commit/91156c3de58762196605150ab3f756fe952592d1refgithub.com/MariaDB/server/commit/9b075b2cb53338f67e7230cc585e02d2d34514edrefgithub.com/MariaDB/server/releases/tag/mariadb-12.3.3refgithub.com/MariaDB/server/releases/tag/mariadb-13.0.2refjira.mariadb.org/browse/MDEV-40396refjira.mariadb.org/browse/MDEV-40639