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Back to active CVEs
Critical · CVSS 9.9CVE-2026-85748

MariaDB: Use-after-free with a large number of SYS_REFCURSOR'sCVE-2026-85748

Answer in brief

CVE-2026-85748 records a Critical severity (CVSS 9.9) vulnerability in MariaDB: Use-after-free with a large number of SYS_REFCURSOR's. The current sources do not mark it as known exploited. The current feed maps MariaDB/server (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 16, 2026Updated Oct 16, 2026Source checked Oct 16, 2026First seen by HOL Oct 16, 2026Material review Oct 16, 2026
Upstream Advisory

Key facts

Risk
Critical · CVSS 9.9
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 9.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps MariaDB/server (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
MariaDB/servergeneric>=12.3.1 <12.3.3 || >=13.0.1 <13.0.212.3.3, 13.0.2

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for MariaDB/server.
  2. 2Review the reported fix. Update MariaDB/server to 12.3.3 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 16, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 16, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 16, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • Source referencejira.mariadb.org
  • Source referencejira.mariadb.org
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • MariaDB: Out-of-bound buffer read on in `ST_Area` of a multipolygon.Same mariadb/server package
  • MariaDB: Out-of-bound buffer write on in `ST_AsText` of nested GeometryCollectionsSame mariadb/server package
  • MariaDB: Unauthorized file access via CONNECT engine UDFsSame mariadb/server package
  • MariaDB: Insufficient quoting in mariadb-dump and SHOW commandsSame mariadb/server package
  • MariaDB: Numerous issues caused by historical #mysql50# tablename encoding bypass.Same mariadb/server package
  • MariaDB: GRANT PROXY with empty password incorrectly checks grantor's privilegesSame mariadb/server package

Record context

Vulnerability class
Memory Corruption
EPSS
Not reported
CWE IDs
CWE-416
Source
CVE List V5
Source checked
Oct 16, 2026
References
7 linked sources
Open source record