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

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.

Timeline

1. Oct 16, 2026, 4:30 PM UTCCVE published
2. Oct 19, 2026, 12:38 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: partial

3. Oct 19, 2026, 12:39 PM UTCRecord last updated

Affected versions

• MariaDB server

  From 10.6.1 · fixed in 10.6.28; From 10.11.1 · fixed in 10.11.19; From 11.4.1 · fixed in 11.4.13; From 11.8.1 · fixed in 11.8.9; From 12.3.1 · fixed in 12.3.3; From 13.0.1 · fixed in 13.0.2

• mariadbBitnami

  From 10.6.1 · fixed in 10.6.28; From 10.11.0 · fixed in 10.11.19; From 11.4.0 · fixed in 11.4.13; From 11.8.0 · fixed in 11.8.9; From 12.3.0 · fixed in 12.3.3; From 13.0.0 · fixed in 13.0.2

• mariadb-minBitnami

  From 10.6.1 · fixed in 10.6.28; From 10.11.0 · fixed in 10.11.19; From 11.4.0 · fixed in 11.4.13; From 11.8.0 · fixed in 11.8.9; From 12.3.0 · fixed in 12.3.3; From 13.0.0 · fixed in 13.0.2

• mysql-clientBitnami

  From 10.6.1 · fixed in 10.6.28; From 10.11.0 · fixed in 10.11.19; From 11.4.0 · fixed in 11.4.13; From 11.8.0 · fixed in 11.8.9; From 12.3.0 · fixed in 12.3.3; From 13.0.0 · fixed in 13.0.2

References 9