CVE-2021-46668

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2022-02-01 · updated 2026-06-17
Weakness: CWE-400

Description

MariaDB through 10.5.9 allows an application crash via certain long SELECT DISTINCT statements that improperly interact with storage-engine resource limitations for temporary data structures.

Affected products

Fedoraproject Fedora: 34, 35, 36
MariaDB: from 10.2.0 before 10.2.43; from 10.3.0 before 10.3.34; from 10.4.0 before 10.4.24; from 10.5.0 before 10.5.15; from 10.6.0 before 10.6.7; from 10.7.0 before 10.7.3 — fixed in 10.2.43, 10.3.34, 10.4.24, 10.5.15, 10.6.7, 10.7.3

How to fix

Upgrade to a fixed version: MariaDB 10.2.43, 10.3.34, 10.4.24, 10.5.15. Check the vendor advisory for mitigations.

References

https://jira.mariadb.org/browse/MDEV-25787
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DKJRBYJAQCOPHSED43A3HUPNKQLDTFGD/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EZFZVMJL5UDTOZMARLXQIMG3BTG6UNYW/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NJ4KDAGF3H4D4BDTHRAM6ZEAJJWWMRUO/
https://mariadb.com/kb/en/security/
https://security.netapp.com/advisory/ntap-20220221-0002/
https://jira.mariadb.org/browse/MDEV-25787
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DKJRBYJAQCOPHSED43A3HUPNKQLDTFGD/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EZFZVMJL5UDTOZMARLXQIMG3BTG6UNYW/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NJ4KDAGF3H4D4BDTHRAM6ZEAJJWWMRUO/
https://mariadb.com/kb/en/security/
https://security.netapp.com/advisory/ntap-20220221-0002/

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