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Fencer Intel
critical 9.9

CVE-2026-85746 in the critical feed json

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

published 2mo ago modified 18d ago also BIT-mariadb-2026-85746 , BIT-mariadb-min-2026-85746 , BIT-mysql-client-2026-85746 , EUVD-2026-102940 , GHSA-8fvj-c57c-pggx

cvss
9.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.0%
EPSS 1.0% chance of exploitation in 30 days, percentile 62%
public exploits
0
none known

Summary

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.

Patch / fix

  • bitnami mariadb 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, 13.0.2
  • bitnami mariadb-min 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, 13.0.2
  • bitnami mysql-client 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, 13.0.2
  • mariadb mariadb 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, 13.0.2
  • mariadb Debian 14 1:11.8.9+ds-1

debian advisories DEBIAN-CVE-2026-85746

  • mariadb openSUSE Tumbleweed 12.3.2-3.1

opensuse advisories openSUSE-SU-2026:12245-1

Is CVE-2026-85746 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-85746 updated cvss 8.8

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

  • Red Hat Enterprise Linux 7 mariadb, mariadb-libs, mariadb-test, mariadb-bench, mariadb-server, mariadb-embedded Red Hat Enterprise Linux 8 Judy, galera, mariadb, mariadb-pam, mariadb-test, mariadb-backup, +8 more Red Hat Enterprise Linux 9 mariadb, mariadb-pam, mariadb-test, mariadb-backup, mariadb-common, mariadb-errmsg, +6 more Red Hat Enterprise Linux 10 mariadb11.8, mariadb10.11 Red Hat OpenStack Platform 13 (Queens) mariadb, mariadb-libs, mariadb-test, mariadb-common, mariadb-config, mariadb-errmsg, +3 more
    affected: workaround, no fix available “Upgrade to the fixed version of MariaDB Server”
  • Red Hat Hardened Images mariadb10.11 10.11.18-4.1.2.hum1, mariadb10.11-pam 10.11.18-4.1.2.hum1, mariadb10.11-test 10.11.18-4.1.2.hum1, mariadb10.11-backup 10.11.18-4.1.2.hum1, mariadb10.11-common 10.11.18-4.1.2.hum1, mariadb10.11-errmsg 10.11.18-4.1.2.hum1, +12 more
    fixed: vendor fix “Upgrade to the fixed version of MariaDB Server” RHSA-2026:88864
  • Red Hat Hardened Images hi/mariadb, mariadb11.8
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
24d ago

Exploit prediction

0.97% chance of exploitation in the next 30 days, higher than 62% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 9.9 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
OSV 3.1 9.9 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
bitnami mariadb
>=10.6.1, <10.6.28
>=10.11.0, <10.11.19
>=11.4.0, <11.4.13
>=11.8.0, <11.8.9
>=12.3.0, <12.3.3
>=13.0.0, <13.0.2
10.6.28
10.11.19
11.4.13
11.8.9
12.3.3
13.0.2
bitnami mariadb-min
>=10.6.1, <10.6.28
>=10.11.0, <10.11.19
>=11.4.0, <11.4.13
>=11.8.0, <11.8.9
>=12.3.0, <12.3.3
>=13.0.0, <13.0.2
10.6.28
10.11.19
11.4.13
11.8.9
12.3.3
13.0.2
bitnami mysql-client
>=10.6.1, <10.6.28
>=10.11.0, <10.11.19
>=11.4.0, <11.4.13
>=11.8.0, <11.8.9
>=12.3.0, <12.3.3
>=13.0.0, <13.0.2
10.6.28
10.11.19
11.4.13
11.8.9
12.3.3
13.0.2

Affected products

  • MariaDB server

Classification

Weakness
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

The maintainers of MariaDB/server published their own advisory on GitHub. Reviewed sources take precedence over it.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.