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Fencer Vulns
medium 4.3

CVE-2026-85745 json

MariaDB: Out-of-bound buffer read on in `ST_Area` of a multipolygon.

published 2026-09-07 2 mo ago modified 2026-10-22 17 d ago also BIT-mariadb-2026-85745 , BIT-mariadb-min-2026-85745 , BIT-mysql-client-2026-85745 , EUVD-2026-102942 , GHSA-p7v9-24h4-mch8

cvss
4.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 45%
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_Area reads beyond the allocated buffer when processing invalid WKB for a MultiPolygon because the multi-polygon parser advances past a nested geometry header without first verifying enough input remains. A low-privileged remote attacker can supply malformed spatial data to disclose memory useful for bypassing ASLR as part of a multi-vulnerability chain. 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-2026-85745

  • mariadb10.11 hummingbird 1 10.11.18-4.1.1.hum1
  • mariadb10.11-pam hummingbird 1 10.11.18-4.1.1.hum1
  • mariadb10.11-test hummingbird 1 10.11.18-4.1.1.hum1
  • mariadb10.11-backup hummingbird 1 10.11.18-4.1.1.hum1
  • mariadb10.11-common hummingbird 1 10.11.18-4.1.1.hum1
  • mariadb10.11-errmsg hummingbird 1 10.11.18-4.1.1.hum1
  • mariadb10.11-server hummingbird 1 10.11.18-4.1.1.hum1
  • mariadb10.11-embedded hummingbird 1 10.11.18-4.1.1.hum1

red hat advisories RHSA-2026:84701RHSA-2026:84689

  • mariadb openSUSE Tumbleweed 12.3.2-3.1

opensuse advisories openSUSE-SU-2026:12245-1

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-2026-85745 updated cvss 4.3

mariadb: mariadb: out-of-bounds read in ST_Area with crafted MULTIPOLYGON

  • 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 11.8.8-1.el10_2, mariadb10.11 10.11.18-1.el10_2
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Hardened Images mariadb11.8 11.8.9-0.1.hum1, mariadb11.8-pam 11.8.9-0.1.hum1, mariadb10.11 10.11.18-4.1.1.hum1, mariadb11.8-test 11.8.9-0.1.hum1, mariadb11.8-backup 11.8.9-0.1.hum1, mariadb11.8-common 11.8.9-0.1.hum1, +31 more
    fixed: vendor fix RHSA-2026:84701
  • 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
    not affected: vulnerable code not present
  • Red Hat Hardened Images hi/mariadb
    not affected: component not present
  • Red Hat OpenStack Platform 13 (Queens) mariadb, mariadb-libs, mariadb-test, mariadb-common, mariadb-config, mariadb-errmsg, +3 more
    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
partial
Assessed
20 d ago

Exploit prediction

0.53% chance of exploitation in the next 30 days, higher than 45% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
OSV 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

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 Vulns 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.