# CVE-2020-2804: libmysqlclient21: Vulnerability in the MySQL Server product of Oracle MySQL (component:Server: Memcached) CVE-2020-2804 is fixed in 27 products on 1 platform, first by RHSA-2020:3732, released September 14, 2020. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2020-2804 - Priority: Routine - CVSS: 5.9 (Medium) - EPSS: 0.0339 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Apr 15, 2020 ## Description Vulnerability in the MySQL Server product of Oracle MySQL (component:Server: Memcached). Supported versions that are affected are 5.6.47 andprior, 5.7.29 and prior and 8.0.19 and prior. Difficult to exploitvulnerability allows unauthenticated attacker with network access viamultiple protocols to compromise MySQL Server. Successful attacks of thisvulnerability can result in unauthorized ability to cause a hang orfrequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.0 BaseScore 5.9 (Availability impacts). CVSS Vector:(CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H). ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | libmysqlclient20 Ubuntu 18.04.6 LTS (bionic) | 5.7.30-0ubuntu0.18.04.1 | [libmysqlclient20 5.7.30-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libmysqlclient20-5.7.30-0ubuntu0.18.04.1.md) | Apr 22, 2021 | | Linux | libmysqlclient21 Ubuntu 20.04 LTS (focal) | 8.0.20-0ubuntu0.20.04.1 | [libmysqlclient21 8.0.20-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libmysqlclient21-8.0.20-0ubuntu0.20.04.1.md) | Apr 22, 2021 | | Linux | libmysqlclient21 Ubuntu 24.10 (oracular) | 8.0.20-0ubuntu1 | [libmysqlclient21 8.0.20-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-libmysqlclient21-8.0.20-0ubuntu1.md) | Jan 16, 2026 | | Linux | mecab RHEL 8 | 0:0.996-1.module+el8.0.0+3898+e09bb8de.9 | [RHSA-2020:3732](https://patchblox.com/security/data/fix/linux/rhsa-2020-3732.md) | Sep 14, 2020 | | Linux | mecab ol 8 | 0:0.996-1.module+el8.0.0+5253+1dce7bb2.9 | [ELSA-2020-3732](https://patchblox.com/security/data/fix/linux/elsa-2020-3732.md) | Sep 16, 2020 | | Linux | mecab-ipadic RHEL 8 | 0:2.7.0.20070801-16.module+el8.0.0+3898+e09bb8de | [RHSA-2020:3732](https://patchblox.com/security/data/fix/linux/rhsa-2020-3732.md) | Sep 14, 2020 | | Linux | mecab-ipadic ol 8 | 0:2.7.0.20070801-16.0.1.module+el8.0.0+5253+1dce7bb2 | [ELSA-2020-3732](https://patchblox.com/security/data/fix/linux/elsa-2020-3732.md) | Sep 16, 2020 | | Linux | mecab-ipadic-EUCJP RHEL 8 | 0:2.7.0.20070801-16.module+el8.0.0+3898+e09bb8de | [RHSA-2020:3732](https://patchblox.com/security/data/fix/linux/rhsa-2020-3732.md) | Sep 14, 2020 | | Linux | mecab-ipadic-EUCJP ol 8 | 0:2.7.0.20070801-16.0.1.module+el8.0.0+5253+1dce7bb2 | [ELSA-2020-3732](https://patchblox.com/security/data/fix/linux/elsa-2020-3732.md) | Sep 16, 2020 | | Linux | mysql RHEL 8 | 0:8.0.21-1.module+el8.2.0+7855+47abd494 | [RHSA-2020:3732](https://patchblox.com/security/data/fix/linux/rhsa-2020-3732.md) | Sep 14, 2020 | | Linux | mysql ol 8 | 0:8.0.21-1.module+el8.2.0+7793+cfe2b687 | [ELSA-2020-3732](https://patchblox.com/security/data/fix/linux/elsa-2020-3732.md) | Sep 16, 2020 | | Linux | mysql-client Ubuntu 18.04.6 LTS (bionic) | 5.7.30-0ubuntu0.18.04.1 | [mysql-client 5.7.30-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mysql-client-5.7.30-0ubuntu0.18.04.1.md) | Apr 22, 2021 | | Linux | mysql-client Ubuntu 20.04 LTS (focal) | 8.0.20-0ubuntu0.20.04.1 | [mysql-client 8.0.20-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-client-8.0.20-0ubuntu0.20.04.1.md) | Apr 22, 2021 | | Linux | mysql-client Ubuntu 24.10 (oracular) | 8.0.20-0ubuntu1 | [mysql-client 8.0.20-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-client-8.0.20-0ubuntu1.md) | Jan 16, 2026 | | Linux | mysql-client-5.7 Ubuntu 18.04.6 LTS (bionic) | 5.7.30-0ubuntu0.18.04.1 | [mysql-client-5.7 5.7.30-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mysql-client-5.7-5.7.30-0ubuntu0.18.04.1.md) | Apr 22, 2021 | | Linux | mysql-client-8.0 Ubuntu 20.04 LTS (focal) | 8.0.20-0ubuntu0.20.04.1 | [mysql-client-8.0 8.0.20-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-client-8.0-8.0.20-0ubuntu0.20.04.1.md) | Apr 22, 2021 | | Linux | mysql-client-8.0 Ubuntu 24.10 (oracular) | 8.0.20-0ubuntu1 | [mysql-client-8.0 8.0.20-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-client-8.0-8.0.20-0ubuntu1.md) | Jan 16, 2026 | | Linux | mysql-client-core-5.7 Ubuntu 18.04.6 LTS (bionic) | 5.7.30-0ubuntu0.18.04.1 | [mysql-client-core-5.7 5.7.30-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mysql-client-core-5.7-5.7.30-0ubuntu0.18.04.1.md) | Apr 22, 2021 | | Linux | mysql-client-core-8.0 Ubuntu 20.04 LTS (focal) | 8.0.20-0ubuntu0.20.04.1 | [mysql-client-core-8.0 8.0.20-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-client-core-8.0-8.0.20-0ubuntu0.20.04.1.md) | Apr 22, 2021 | | Linux | mysql-client-core-8.0 Ubuntu 24.10 (oracular) | 8.0.20-0ubuntu1 | [mysql-client-core-8.0 8.0.20-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-client-core-8.0-8.0.20-0ubuntu1.md) | Jan 16, 2026 | | Linux | mysql-common RHEL 8 | 0:8.0.21-1.module+el8.2.0+7855+47abd494 | [RHSA-2020:3732](https://patchblox.com/security/data/fix/linux/rhsa-2020-3732.md) | Sep 14, 2020 | | Linux | mysql-common ol 8 | 0:8.0.21-1.module+el8.2.0+7793+cfe2b687 | [ELSA-2020-3732](https://patchblox.com/security/data/fix/linux/elsa-2020-3732.md) | Sep 16, 2020 | | Linux | mysql-devel RHEL 8 | 0:8.0.21-1.module+el8.2.0+7855+47abd494 | [RHSA-2020:3732](https://patchblox.com/security/data/fix/linux/rhsa-2020-3732.md) | Sep 14, 2020 | | Linux | mysql-devel ol 8 | 0:8.0.21-1.module+el8.2.0+7793+cfe2b687 | [ELSA-2020-3732](https://patchblox.com/security/data/fix/linux/elsa-2020-3732.md) | Sep 16, 2020 | | Linux | mysql-errmsg RHEL 8 | 0:8.0.21-1.module+el8.2.0+7855+47abd494 | [RHSA-2020:3732](https://patchblox.com/security/data/fix/linux/rhsa-2020-3732.md) | Sep 14, 2020 | | Linux | mysql-errmsg ol 8 | 0:8.0.21-1.module+el8.2.0+7793+cfe2b687 | [ELSA-2020-3732](https://patchblox.com/security/data/fix/linux/elsa-2020-3732.md) | Sep 16, 2020 | | Linux | mysql-libs RHEL 8 | 0:8.0.21-1.module+el8.2.0+7855+47abd494 | [RHSA-2020:3732](https://patchblox.com/security/data/fix/linux/rhsa-2020-3732.md) | Sep 14, 2020 | | Linux | mysql-libs ol 8 | 0:8.0.21-1.module+el8.2.0+7793+cfe2b687 | [ELSA-2020-3732](https://patchblox.com/security/data/fix/linux/elsa-2020-3732.md) | Sep 16, 2020 | | Linux | mysql-router Ubuntu 20.04 LTS (focal) | 8.0.20-0ubuntu0.20.04.1 | [mysql-router 8.0.20-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-router-8.0.20-0ubuntu0.20.04.1.md) | Apr 22, 2021 | | Linux | mysql-router Ubuntu 24.10 (oracular) | 8.0.20-0ubuntu1 | [mysql-router 8.0.20-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-router-8.0.20-0ubuntu1.md) | Jan 16, 2026 | | Linux | mysql-server RHEL 8 | 0:8.0.21-1.module+el8.2.0+7855+47abd494 | [RHSA-2020:3732](https://patchblox.com/security/data/fix/linux/rhsa-2020-3732.md) | Sep 14, 2020 | | Linux | mysql-server Ubuntu 18.04.6 LTS (bionic) | 5.7.30-0ubuntu0.18.04.1 | [mysql-server 5.7.30-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mysql-server-5.7.30-0ubuntu0.18.04.1.md) | Apr 22, 2021 | | Linux | mysql-server Ubuntu 20.04 LTS (focal) | 8.0.20-0ubuntu0.20.04.1 | [mysql-server 8.0.20-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-server-8.0.20-0ubuntu0.20.04.1.md) | Apr 22, 2021 | | Linux | mysql-server Ubuntu 24.10 (oracular) | 8.0.20-0ubuntu1 | [mysql-server 8.0.20-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-server-8.0.20-0ubuntu1.md) | Jan 16, 2026 | | Linux | mysql-server ol 8 | 0:8.0.21-1.module+el8.2.0+7793+cfe2b687 | [ELSA-2020-3732](https://patchblox.com/security/data/fix/linux/elsa-2020-3732.md) | Sep 16, 2020 | | Linux | mysql-server-5.7 Ubuntu 18.04.6 LTS (bionic) | 5.7.30-0ubuntu0.18.04.1 | [mysql-server-5.7 5.7.30-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mysql-server-5.7-5.7.30-0ubuntu0.18.04.1.md) | Apr 22, 2021 | | Linux | mysql-server-8.0 Ubuntu 20.04 LTS (focal) | 8.0.20-0ubuntu0.20.04.1 | [mysql-server-8.0 8.0.20-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-server-8.0-8.0.20-0ubuntu0.20.04.1.md) | Apr 22, 2021 | | Linux | mysql-server-8.0 Ubuntu 24.10 (oracular) | 8.0.20-0ubuntu1 | [mysql-server-8.0 8.0.20-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-server-8.0-8.0.20-0ubuntu1.md) | Jan 16, 2026 | | Linux | mysql-server-core-5.7 Ubuntu 18.04.6 LTS (bionic) | 5.7.30-0ubuntu0.18.04.1 | [mysql-server-core-5.7 5.7.30-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mysql-server-core-5.7-5.7.30-0ubuntu0.18.04.1.md) | Apr 22, 2021 | | Linux | mysql-server-core-8.0 Ubuntu 20.04 LTS (focal) | 8.0.20-0ubuntu0.20.04.1 | [mysql-server-core-8.0 8.0.20-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-server-core-8.0-8.0.20-0ubuntu0.20.04.1.md) | Apr 22, 2021 | | Linux | mysql-server-core-8.0 Ubuntu 24.10 (oracular) | 8.0.20-0ubuntu1 | [mysql-server-core-8.0 8.0.20-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-server-core-8.0-8.0.20-0ubuntu1.md) | Jan 16, 2026 | | Linux | mysql-source-5.7 Ubuntu 18.04.6 LTS (bionic) | 5.7.30-0ubuntu0.18.04.1 | [mysql-source-5.7 5.7.30-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mysql-source-5.7-5.7.30-0ubuntu0.18.04.1.md) | Apr 22, 2021 | | Linux | mysql-source-8.0 Ubuntu 20.04 LTS (focal) | 8.0.20-0ubuntu0.20.04.1 | [mysql-source-8.0 8.0.20-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-source-8.0-8.0.20-0ubuntu0.20.04.1.md) | Apr 22, 2021 | | Linux | mysql-source-8.0 Ubuntu 24.10 (oracular) | 8.0.20-0ubuntu1 | [mysql-source-8.0 8.0.20-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-source-8.0-8.0.20-0ubuntu1.md) | Jan 16, 2026 | | Linux | mysql-test RHEL 8 | 0:8.0.21-1.module+el8.2.0+7855+47abd494 | [RHSA-2020:3732](https://patchblox.com/security/data/fix/linux/rhsa-2020-3732.md) | Sep 14, 2020 | | Linux | mysql-test ol 8 | 0:8.0.21-1.module+el8.2.0+7793+cfe2b687 | [ELSA-2020-3732](https://patchblox.com/security/data/fix/linux/elsa-2020-3732.md) | Sep 16, 2020 | | Linux | mysql-testsuite Ubuntu 18.04.6 LTS (bionic) | 5.7.30-0ubuntu0.18.04.1 | [mysql-testsuite 5.7.30-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mysql-testsuite-5.7.30-0ubuntu0.18.04.1.md) | Apr 22, 2021 | | Linux | mysql-testsuite Ubuntu 20.04 LTS (focal) | 8.0.20-0ubuntu0.20.04.1 | [mysql-testsuite 8.0.20-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-testsuite-8.0.20-0ubuntu0.20.04.1.md) | Apr 22, 2021 | | Linux | mysql-testsuite Ubuntu 24.10 (oracular) | 8.0.20-0ubuntu1 | [mysql-testsuite 8.0.20-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-testsuite-8.0.20-0ubuntu1.md) | Jan 16, 2026 | | Linux | mysql-testsuite-5.7 Ubuntu 18.04.6 LTS (bionic) | 5.7.30-0ubuntu0.18.04.1 | [mysql-testsuite-5.7 5.7.30-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mysql-testsuite-5.7-5.7.30-0ubuntu0.18.04.1.md) | Apr 22, 2021 | | Linux | mysql-testsuite-8.0 Ubuntu 20.04 LTS (focal) | 8.0.20-0ubuntu0.20.04.1 | [mysql-testsuite-8.0 8.0.20-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-testsuite-8.0-8.0.20-0ubuntu0.20.04.1.md) | Apr 22, 2021 | | Linux | mysql-testsuite-8.0 Ubuntu 24.10 (oracular) | 8.0.20-0ubuntu1 | [mysql-testsuite-8.0 8.0.20-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-testsuite-8.0-8.0.20-0ubuntu1.md) | Jan 16, 2026 | --- Data as of 2026-11-07T18:46:35Z UTC. 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