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CVE-2026-85748

CRITICAL 9.9

Published 2026-10-16 · Last modified 2026-10-16

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.

ELEVATED IMPACT

Severe if exploited (CVSS 9.9), but no known exploitation and low modeled probability. Patch on a normal cadence.

Exploitation likelihood

0.9%chance of exploitation in 30 days · 60th percentile

○ In CISA KEV ○ Catalogued PoC

Impact if exploited

9.9CVSS 3.1 · CRITICAL

  • ConfidentialityHigh
  • IntegrityHigh
  • AvailabilityHigh

What an attacker needs

  • ✓Access: Reachable over the network — no local access needed
  • ⚠Privileges: Requires a low-privilege account
  • ✓User interaction: No user interaction needed
  • ✓Complexity: No special conditions — reliably repeatable

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

Search for new PoCs

Search GitHub now — results may be empty or unverified.

Tracked sources are checked daily for recent CVEs, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Data snapshot:

Affected

Vendors Mariadb

Products Server Mariadb

Weakness (CWE)

  • CWE-416: : Use After Free

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

References and research data (JSON)

Vendor product assessments

Showing 32 of 137 vendor product statements; 105 omitted. Read the full vendor advisory.

  • mariadb as a component of Red Hat Enterprise Linux 10 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/mariadb

    Red Hat · CVE-2026-85748 · Updated 2026-10-17T03:05:50+00:00
  • mariadb-devel as a component of Red Hat Enterprise Linux 10 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/mariadb-devel

    Red Hat · CVE-2026-85748 · Updated 2026-10-17T03:05:50+00:00
  • mariadb-oqgraph-engine as a component of Red Hat Enterprise Linux 10 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/mariadb-oqgraph-engine

    Red Hat · CVE-2026-85748 · Updated 2026-10-17T03:05:50+00:00
  • mariadb-server-utils as a component of Red Hat Enterprise Linux 10 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/mariadb-server-utils

    Red Hat · CVE-2026-85748 · Updated 2026-10-17T03:05:50+00:00
  • mariadb11.8-client-utils as a component of Red Hat Enterprise Linux 10 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/mariadb11.8-client-utils

    Red Hat · CVE-2026-85748 · Updated 2026-10-17T03:05:50+00:00
  • mariadb11.8-embedded-devel as a component of Red Hat Enterprise Linux 10 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/mariadb11.8-embedded-devel

    Red Hat · CVE-2026-85748 · Updated 2026-10-17T03:05:50+00:00
  • mariadb11.8-pam as a component of Red Hat Enterprise Linux 10 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/mariadb11.8-pam

    Red Hat · CVE-2026-85748 · Updated 2026-10-17T03:05:50+00:00
  • mariadb11.8.src as a component of Red Hat Enterprise Linux 10 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/mariadb11.8?arch=src

    Red Hat · CVE-2026-85748 · Updated 2026-10-17T03:05:50+00:00
  • mariadb-embedded as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/mariadb-embedded

    Red Hat · CVE-2026-85748 · Updated 2026-10-17T03:05:50+00:00
  • mariadb-test as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/mariadb-test

    Red Hat · CVE-2026-85748 · Updated 2026-10-17T03:05:50+00:00
  • Judy (mariadb:10.3) as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/Judy?rpmmod=mariadb:10.3

    Red Hat · CVE-2026-85748 · Updated 2026-10-17T03:05:50+00:00
  • galera (mariadb:10.3) as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/galera?rpmmod=mariadb:10.3

    Red Hat · CVE-2026-85748 · Updated 2026-10-17T03:05:50+00:00
  • mariadb-devel (mariadb:10.11) as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/mariadb-devel?rpmmod=mariadb:10.11

    Red Hat · CVE-2026-85748 · Updated 2026-10-17T03:05:50+00:00
  • mariadb-embedded (mariadb:10.11) as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/mariadb-embedded?rpmmod=mariadb:10.11

    Red Hat · CVE-2026-85748 · Updated 2026-10-17T03:05:50+00:00
  • mariadb-gssapi-server (mariadb:10.11) as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/mariadb-gssapi-server?rpmmod=mariadb:10.11

    Red Hat · CVE-2026-85748 · Updated 2026-10-17T03:05:50+00:00
  • mariadb-pam (mariadb:10.3) as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/mariadb-pam?rpmmod=mariadb:10.3

    Red Hat · CVE-2026-85748 · Updated 2026-10-17T03:05:50+00:00
  • mariadb-server-utils (mariadb:10.3) as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/mariadb-server-utils?rpmmod=mariadb:10.3

    Red Hat · CVE-2026-85748 · Updated 2026-10-17T03:05:50+00:00
  • mariadb.src (mariadb:10.11) as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/mariadb?arch=src&rpmmod=mariadb:10.11

    Red Hat · CVE-2026-85748 · Updated 2026-10-17T03:05:50+00:00
  • mariadb as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/mariadb

    Red Hat · CVE-2026-85748 · Updated 2026-10-17T03:05:50+00:00
  • mariadb-common as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/mariadb-common

    Red Hat · CVE-2026-85748 · Updated 2026-10-17T03:05:50+00:00
  • mariadb-devel (mariadb:11.8) as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/mariadb-devel?rpmmod=mariadb:11.8

    Red Hat · CVE-2026-85748 · Updated 2026-10-17T03:05:50+00:00
  • mariadb-embedded-devel (mariadb:11.8) as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/mariadb-embedded-devel?rpmmod=mariadb:11.8

    Red Hat · CVE-2026-85748 · Updated 2026-10-17T03:05:50+00:00
  • mariadb-errmsg (mariadb:11.8) as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/mariadb-errmsg?rpmmod=mariadb:11.8

    Red Hat · CVE-2026-85748 · Updated 2026-10-17T03:05:50+00:00
  • mariadb-oqgraph-engine as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/mariadb-oqgraph-engine

    Red Hat · CVE-2026-85748 · Updated 2026-10-17T03:05:50+00:00
  • mariadb-pam (mariadb:10.11) as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/mariadb-pam?rpmmod=mariadb:10.11

    Red Hat · CVE-2026-85748 · Updated 2026-10-17T03:05:50+00:00
  • mariadb-server-galera (mariadb:11.8) as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/mariadb-server-galera?rpmmod=mariadb:11.8

    Red Hat · CVE-2026-85748 · Updated 2026-10-17T03:05:50+00:00
  • mariadb-server (mariadb:10.11) as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/mariadb-server?rpmmod=mariadb:10.11

    Red Hat · CVE-2026-85748 · Updated 2026-10-17T03:05:50+00:00
  • mariadb-test (mariadb:11.8) as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/mariadb-test?rpmmod=mariadb:11.8

    Red Hat · CVE-2026-85748 · Updated 2026-10-17T03:05:50+00:00
  • mariadb (mariadb:11.8) as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/mariadb?rpmmod=mariadb:11.8

    Red Hat · CVE-2026-85748 · Updated 2026-10-17T03:05:50+00:00
  • mariadb as a component of Red Hat OpenStack Platform 13 (Queens) · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/mariadb

    Red Hat · CVE-2026-85748 · Updated 2026-10-17T03:05:50+00:00
  • mariadb-libs as a component of Red Hat OpenStack Platform 13 (Queens) · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/mariadb-libs

    Red Hat · CVE-2026-85748 · Updated 2026-10-17T03:05:50+00:00
  • mariadb.src as a component of Red Hat OpenStack Platform 13 (Queens) · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/mariadb?arch=src

    Red Hat · CVE-2026-85748 · Updated 2026-10-17T03:05:50+00:00

Known Affected Software Configurations

VendorProductVersion range
MariadbMariadb≥ 12.3.1 and < 12.3.3
MariadbMariadb13.0.1

All CVSS metrics

  • CRITICAL 9.9 v3.1 · CNA Primary
    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
  • CRITICAL 9.9 v3.1 · NVD Secondary
    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

References

Patches & mitigations

Advisories

Technical & other

Sources: NVD · CVE.org · EPSS