Paper/Archive/CVE-2026-85746

CVE-2026-85746

MariaDB server — MariaDB: Out-of-bound buffer write on in `ST_AsText` of nested GeometryCollections

CVSS 9.9 (CNA)9.9 / 10 × 3029.7 Not in CISA KEV+300.0 EPSS percentile 61.8.618 × 2012.4 No public exploit+100.0 SSVC exploitation: none+100.0

Description · from the CVE record

MariaDB server is a community developed fork of MySQL server. From 10.6.1 until 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, and 13.0.2, ST_AsText can write beyond an allocated output buffer when converting deeply nested GeometryCollections because recursive WKT serialization does not account for bytes consumed or reserve sufficient space. A low-privileged remote attacker can submit a specially crafted GIS object to corrupt memory and potentially achieve code execution when combined with another vulnerability. This issue is fixed in versions 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, and 13.0.2.

Affected

ProductAffectedFixed inSource

server>= 10.6.1, < 10.6.28–CNA

server>= 10.11.1, < 10.11.19–CNA

server>= 11.4.1, < 11.4.13–CNA

server>= 11.8.1, < 11.8.9–CNA

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