> For the complete documentation index, see [llms.txt](https://mariadb.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mariadb.com/docs/release-notes/enterprise-server/old-releases/10.5/10.5.6-4.md).

# Release Notes for MariaDB Enterprise Server 10.5.6-4

MariaDB Enterprise Server 10.5.6-4 is a Stable (GA) maintenance release of MariaDB Enterprise Server 10.5, released on 2020-10-07

This fourth release of [MariaDB Enterprise Server](/docs/release-notes/enterprise-server.md) 10.5 is a hotfix release to address a CVE which has been rated "critical" using the criteria defined in the [MariaDB Engineering Policy](https://mariadb.com/engineering-policies).

MariaDB Enterprise Server 10.5.6-4 was released on 2020-10-07.

## Fixed Security Vulnerabilities

| CVE (with [cve.org](https://www.cve.org/) link)                                 | CVSS base score    |
| ------------------------------------------------------------------------------- | ------------------ |
| [CVE-2020-15180](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15180) | N/A (Critical)`#1` |

`#1`:\
MariaDB CVEs are assigned a word rating instead of a CVSS base score. See the [MariaDB Engineering Policy](https://mariadb.com/engineering-policies) for details.

## Changes in Storage Engines

* This release originally included [ColumnStore 5.4.1](/docs/release-notes/columnstore/old-releases/mariadb-columnstore-5-4-release-notes/mariadb-columnstore-5-4-1-release-notes.md).
* This release has been updated to include [ColumnStore 5.4.3](/docs/release-notes/columnstore/old-releases/mariadb-columnstore-5-4-release-notes/mariadb-columnstore-5-4-3-release-notes.md) on 2020-11-09.

## Platforms

In alignment with the [enterprise lifecycle](/docs/release-notes/enterprise-server/about/enterprise-server-lifecycle.md), MariaDB Enterprise Server 10.5.6-4 is provided for:

* AlmaLinux 8 (x86\_64, ARM64)
* AlmaLinux 9 (x86\_64, ARM64)
* Debian 11 (x86\_64, ARM64)
* Debian 12 (x86\_64, ARM64)
* Microsoft Windows (x86\_64) (MariaDB Enterprise Cluster excluded)
* Red Hat Enterprise Linux 8 (x86\_64, ARM64)
* Red Hat Enterprise Linux 9 (x86\_64, ARM64)
* Rocky Linux 8 (x86\_64, ARM64)
* Rocky Linux 9 (x86\_64, ARM64)
* SUSE Linux Enterprise Server 12 (x86\_64)
* SUSE Linux Enterprise Server 15 (x86\_64, ARM64)
* Ubuntu 20.04 (x86\_64, ARM64)

Some components of MariaDB Enterprise Server might not support all platforms. For additional information, see "[MariaDB Corporation Engineering Policies](https://mariadb.com/engineering-policies)".

## Installation Instructions

* [MariaDB Enterprise Server ](/docs/release-notes/enterprise-server/11.4/whats-new.md)[10](https://app.gitbook.com/s/0pSbu5DcMSW4KwAkUcmX/maxscale-architecture/mariadb-enterprise-spider-topologies/federated-mariadb-enterprise-spider-topology)[.5](/docs/release-notes/enterprise-server/11.4/whats-new.md)
* [Enterprise Cluster Topology with MariaDB Enterprise Server ](/docs/server/architecture/topologies/galera-cluster.md)[10](https://app.gitbook.com/s/0pSbu5DcMSW4KwAkUcmX/maxscale-architecture/mariadb-enterprise-spider-topologies/federated-mariadb-enterprise-spider-topology)[.5](/docs/server/architecture/topologies/galera-cluster.md)
* [Primary/Replica Topology with MariaDB Enterprise Server 10.5](/docs/server/architecture/topologies/primary-replica.md)
* [ColumnStore Object Storage Topology with MariaDB Enterprise Server 10.5](/docs/server/architecture/topologies/columnstore-object-storage.md) [and MariaDB ColumnStore 23.02](/docs/server/architecture/topologies/columnstore-object-storage.md)
* [ColumnStore Shared Local Storage Topology with MariaDB Enterprise Server 10.5](/docs/server/architecture/topologies/columnstore-shared-local-storage.md)[ and MariaDB ColumnStore 23.02](/docs/server/architecture/topologies/columnstore-shared-local-storage.md)
* [HTAP Topology with MariaDB Enterprise Server 10.5](/docs/server/architecture/topologies/htap.md)[ and MariaDB ColumnStore 23.02](/docs/server/architecture/topologies/htap.md)
* [Single-Node ColumnStore 23.02 with MariaDB Enterprise Server 10.5](/docs/server/architecture/topologies/single-node-topologies/enterprise-server-with-columnstore-object-storage.md)[and Object Storage](/docs/server/architecture/topologies/single-node-topologies/enterprise-server-with-columnstore-object-storage.md)
* [Single-Node ColumnStore 23.02 with MariaDB Enterprise Server 10.5](/docs/server/architecture/topologies/single-node-topologies.md)
* [Enterprise Spider Sharded Topology with MariaDB Enterprise Server 10.5](https://app.gitbook.com/s/0pSbu5DcMSW4KwAkUcmX/maxscale-architecture/mariadb-enterprise-spider-topologies/sharded-mariadb-enterprise-spider-topology)
* [Enterprise Spider Federated Topology with MariaDB Enterprise Server 10.5](https://app.gitbook.com/s/0pSbu5DcMSW4KwAkUcmX/maxscale-architecture/mariadb-enterprise-spider-topologies/federated-mariadb-enterprise-spider-topology)

## Upgrade Instructions

* [Upgrade to MariaDB Enterprise Server 10.5](/docs/server/server-management/install-and-upgrade-mariadb/upgrading/mariadb-community-server-upgrade-paths/upgrading-from-mariadb-10-5-to-mariadb-10-6.md)
* [Upgrade from MariaDB Community Server to MariaDB Enterprise Server 10.5](/docs/server/server-management/install-and-upgrade-mariadb/upgrading/platform-specific-upgrade-guides/upgrading-on-linux/upgrading-between-major-mariadb-versions.md)

<sub>*This page is: Copyright © 2026 MariaDB. All rights reserved.*</sub>

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