TI-2026-75371 Aliases CVE-2026-85748

Use-after-free in MariaDB server via many SYS_REFCURSOR objects

MEDIUM 45CWE-416Published 2026-10-16 · Updated 2026-10-16

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-416 and the CVSS impact.

Summary

MariaDB server from 12.3.1 before 12.3.3 and from 13.0.1 before 13.0.2 is affected. Cursor-array reallocation leaves stale references in routine contexts, causing a use-after-free (CWE-416). A low-privileged attacker can open many SYS_REFCURSORs and fetch one to trigger the flaw, which can enable remote code execution when combined with another vulnerability.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.01179 67th percentileScored 2026-11-07

Fix Fixed server (MariaDB): 12.3.3, 13.0.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
MariaDB	server	12.3.1 to before 12.3.3; 13.0.1 to before 13.0.2	12.3.3, 13.0.2	Patch available	CNA

server VendorMariaDB Affected 12.3.1 to before 12.3.3; 13.0.1 to before 13.0.2 Fixed in 12.3.3, 13.0.2 Patch available CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:a:mariadb:mariadb::::::::	12.3.1 to before 12.3.3	Vulnerable	MariaDB
cpe:2.3:a:mariadb:mariadb:13.0.1:::::::*	13.0.1	Vulnerable	MariaDB

cpe:2.3:a:mariadb:mariadb:*:*:*:*:*:*:*:* Versions 12.3.1 to before 12.3.3 Vulnerable ·MariaDB
cpe:2.3:a:mariadb:mariadb:13.0.1:*:*:*:*:*:*:* Versions 13.0.1 Vulnerable ·MariaDB

Remediation

The fix is in MariaDB server versions 12.3.3 and 13.0.2.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Fix · CNA server (MariaDB) Fixed in 12.3.3, 13.0.2

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

Not affected: 6 products

Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9
Red Hat Hardened Images
Red Hat OpenStack Platform 13 (Queens)

Timeline

2026-10-16 Threatist record created from CVE-2026-85748
2026-10-16 CISA SSVC decision points changed
2026-10-25 EPSS moved to the 50th–90th percentile

References

Patch 2

Advisory 1

https://github.com/MariaDB/server/security/advisories/GHSA-mv8g-9f7q-hprm

Other 4

TI-2023-11776 MariaDB v10.5 was discovered to contain a remote code execution (RCE) vulnerability via… CVSS 3.1CRITICAL 9.8
TI-2016-05707 Oracle MySQL through 5.5.52, 5.6.x through 5.6.33, and 5.7.x through 5.7.15; MariaDB… CVSS 3.0CRITICAL 9.8
TI-2022-00687 Infinite loop in BN_mod_sqrt() reachable when parsing certificates CVSS 3.1HIGH 7.5
TI-2014-00217 OpenSSL before 0.9.8za, 1.0.0 before 1.0.0m, and 1.0.1 before 1.0.1h does not properly… CVSS 3.1HIGH 7.4
TI-2014-00188 The dtls1_reassemble_fragment function in d1_both.c in OpenSSL before 0.9.8za, 1.0.0… CVSS 2.0MEDIUM 6.8
TI-2018-15259 zlib before 1.2.12 allows memory corruption when deflating (i.e., when compressing) if… CVSS 3.1HIGH 7.5

See all 429 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences