# CVE-2021-2011: mysql-server: Vulnerability in the MySQL Client product of Oracle MySQL (component: CAPI)

CVE-2021-2011 is fixed in 27 products on 1 platform, first by libmysqlclient20 5.7.33-0ubuntu0.18.04.1, released April 22, 2021. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-2011
- Priority: Routine
- CVSS: 5.9 (Medium)
- EPSS: 0.0309
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jan 20, 2021

## Description

Vulnerability in the MySQL Client product of Oracle MySQL (component: CAPI). Supported versions that are affected are 5.7.32 and prior and 8.0.22and prior. Difficult to exploit vulnerability allows unauthenticatedattacker with network access via multiple protocols to compromise MySQLClient. Successful attacks of this vulnerability can result in unauthorizedability to cause a hang or frequently repeatable crash (complete DOS) ofMySQL Client. CVSS 3.1 Base Score 5.9 (Availability impacts). CVSS Vector:(CVSS:3.1/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) | 5.7.33-0ubuntu0.18.04.1 | [libmysqlclient20 5.7.33-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libmysqlclient20-5.7.33-0ubuntu0.18.04.1.md) | Apr 22, 2021 |
| Linux | libmysqlclient21 Ubuntu 20.04 LTS (focal) | 8.0.23-0ubuntu0.20.04.1 | [libmysqlclient21 8.0.23-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libmysqlclient21-8.0.23-0ubuntu0.20.04.1.md) | Apr 22, 2021 |
| Linux | libmysqlclient21 Ubuntu 24.10 (oracular) | 8.0.23-1 | [libmysqlclient21 8.0.23-1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-libmysqlclient21-8.0.23-1.md) | Jan 16, 2026 |
| Linux | mecab RHEL 8 | 0:0.996-1.module+el8.0.0+3898+e09bb8de.9 | [RHSA-2021:3590](https://patchblox.com/security/data/fix/linux/rhsa-2021-3590.md) | Sep 21, 2021 |
| Linux | mecab ol 8 | 0:0.996-1.module+el8.0.0+5253+1dce7bb2.9 | [ELSA-2021-3590](https://patchblox.com/security/data/fix/linux/elsa-2021-3590.md) | Sep 23, 2021 |
| Linux | mecab-ipadic RHEL 8 | 0:2.7.0.20070801-16.module+el8.0.0+3898+e09bb8de | [RHSA-2021:3590](https://patchblox.com/security/data/fix/linux/rhsa-2021-3590.md) | Sep 21, 2021 |
| Linux | mecab-ipadic ol 8 | 0:2.7.0.20070801-16.0.1.module+el8.0.0+5253+1dce7bb2 | [ELSA-2021-3590](https://patchblox.com/security/data/fix/linux/elsa-2021-3590.md) | Sep 23, 2021 |
| Linux | mecab-ipadic-EUCJP RHEL 8 | 0:2.7.0.20070801-16.module+el8.0.0+3898+e09bb8de | [RHSA-2021:3590](https://patchblox.com/security/data/fix/linux/rhsa-2021-3590.md) | Sep 21, 2021 |
| Linux | mecab-ipadic-EUCJP ol 8 | 0:2.7.0.20070801-16.0.1.module+el8.0.0+5253+1dce7bb2 | [ELSA-2021-3590](https://patchblox.com/security/data/fix/linux/elsa-2021-3590.md) | Sep 23, 2021 |
| Linux | mysql RHEL 8 | 0:8.0.26-1.module+el8.4.0+12359+b8928c02 | [RHSA-2021:3590](https://patchblox.com/security/data/fix/linux/rhsa-2021-3590.md) | Sep 21, 2021 |
| Linux | mysql ol 8 | 0:8.0.26-1.module+el8.4.0+20311+30d12931 | [ELSA-2021-3590](https://patchblox.com/security/data/fix/linux/elsa-2021-3590.md) | Sep 23, 2021 |
| Linux | mysql-client Ubuntu 18.04.6 LTS (bionic) | 5.7.33-0ubuntu0.18.04.1 | [mysql-client 5.7.33-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mysql-client-5.7.33-0ubuntu0.18.04.1.md) | Apr 22, 2021 |
| Linux | mysql-client Ubuntu 20.04 LTS (focal) | 8.0.23-0ubuntu0.20.04.1 | [mysql-client 8.0.23-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-client-8.0.23-0ubuntu0.20.04.1.md) | Apr 22, 2021 |
| Linux | mysql-client Ubuntu 24.10 (oracular) | 8.0.23-1 | [mysql-client 8.0.23-1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-client-8.0.23-1.md) | Jan 16, 2026 |
| Linux | mysql-client-5.7 Ubuntu 18.04.6 LTS (bionic) | 5.7.33-0ubuntu0.18.04.1 | [mysql-client-5.7 5.7.33-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mysql-client-5.7-5.7.33-0ubuntu0.18.04.1.md) | Apr 22, 2021 |
| Linux | mysql-client-8.0 Ubuntu 20.04 LTS (focal) | 8.0.23-0ubuntu0.20.04.1 | [mysql-client-8.0 8.0.23-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-client-8.0-8.0.23-0ubuntu0.20.04.1.md) | Apr 22, 2021 |
| Linux | mysql-client-8.0 Ubuntu 24.10 (oracular) | 8.0.23-1 | [mysql-client-8.0 8.0.23-1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-client-8.0-8.0.23-1.md) | Jan 16, 2026 |
| Linux | mysql-client-core-5.7 Ubuntu 18.04.6 LTS (bionic) | 5.7.33-0ubuntu0.18.04.1 | [mysql-client-core-5.7 5.7.33-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mysql-client-core-5.7-5.7.33-0ubuntu0.18.04.1.md) | Apr 22, 2021 |
| Linux | mysql-client-core-8.0 Ubuntu 20.04 LTS (focal) | 8.0.23-0ubuntu0.20.04.1 | [mysql-client-core-8.0 8.0.23-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-client-core-8.0-8.0.23-0ubuntu0.20.04.1.md) | Apr 22, 2021 |
| Linux | mysql-client-core-8.0 Ubuntu 24.10 (oracular) | 8.0.23-1 | [mysql-client-core-8.0 8.0.23-1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-client-core-8.0-8.0.23-1.md) | Jan 16, 2026 |
| Linux | mysql-common RHEL 8 | 0:8.0.26-1.module+el8.4.0+12359+b8928c02 | [RHSA-2021:3590](https://patchblox.com/security/data/fix/linux/rhsa-2021-3590.md) | Sep 21, 2021 |
| Linux | mysql-common ol 8 | 0:8.0.26-1.module+el8.4.0+20311+30d12931 | [ELSA-2021-3590](https://patchblox.com/security/data/fix/linux/elsa-2021-3590.md) | Sep 23, 2021 |
| Linux | mysql-devel RHEL 8 | 0:8.0.26-1.module+el8.4.0+12359+b8928c02 | [RHSA-2021:3590](https://patchblox.com/security/data/fix/linux/rhsa-2021-3590.md) | Sep 21, 2021 |
| Linux | mysql-devel ol 8 | 0:8.0.26-1.module+el8.4.0+20311+30d12931 | [ELSA-2021-3590](https://patchblox.com/security/data/fix/linux/elsa-2021-3590.md) | Sep 23, 2021 |
| Linux | mysql-errmsg RHEL 8 | 0:8.0.26-1.module+el8.4.0+12359+b8928c02 | [RHSA-2021:3590](https://patchblox.com/security/data/fix/linux/rhsa-2021-3590.md) | Sep 21, 2021 |
| Linux | mysql-errmsg ol 8 | 0:8.0.26-1.module+el8.4.0+20311+30d12931 | [ELSA-2021-3590](https://patchblox.com/security/data/fix/linux/elsa-2021-3590.md) | Sep 23, 2021 |
| Linux | mysql-libs RHEL 8 | 0:8.0.26-1.module+el8.4.0+12359+b8928c02 | [RHSA-2021:3590](https://patchblox.com/security/data/fix/linux/rhsa-2021-3590.md) | Sep 21, 2021 |
| Linux | mysql-libs ol 8 | 0:8.0.26-1.module+el8.4.0+20311+30d12931 | [ELSA-2021-3590](https://patchblox.com/security/data/fix/linux/elsa-2021-3590.md) | Sep 23, 2021 |
| Linux | mysql-router Ubuntu 20.04 LTS (focal) | 8.0.23-0ubuntu0.20.04.1 | [mysql-router 8.0.23-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-router-8.0.23-0ubuntu0.20.04.1.md) | Apr 22, 2021 |
| Linux | mysql-router Ubuntu 24.10 (oracular) | 8.0.23-1 | [mysql-router 8.0.23-1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-router-8.0.23-1.md) | Jan 16, 2026 |
| Linux | mysql-server RHEL 8 | 0:8.0.26-1.module+el8.4.0+12359+b8928c02 | [RHSA-2021:3590](https://patchblox.com/security/data/fix/linux/rhsa-2021-3590.md) | Sep 21, 2021 |
| Linux | mysql-server Ubuntu 18.04.6 LTS (bionic) | 5.7.33-0ubuntu0.18.04.1 | [mysql-server 5.7.33-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mysql-server-5.7.33-0ubuntu0.18.04.1.md) | Apr 22, 2021 |
| Linux | mysql-server Ubuntu 20.04 LTS (focal) | 8.0.23-0ubuntu0.20.04.1 | [mysql-server 8.0.23-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-server-8.0.23-0ubuntu0.20.04.1.md) | Apr 22, 2021 |
| Linux | mysql-server Ubuntu 24.10 (oracular) | 8.0.23-1 | [mysql-server 8.0.23-1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-server-8.0.23-1.md) | Jan 16, 2026 |
| Linux | mysql-server ol 8 | 0:8.0.26-1.module+el8.4.0+20311+30d12931 | [ELSA-2021-3590](https://patchblox.com/security/data/fix/linux/elsa-2021-3590.md) | Sep 23, 2021 |
| Linux | mysql-server-5.7 Ubuntu 18.04.6 LTS (bionic) | 5.7.33-0ubuntu0.18.04.1 | [mysql-server-5.7 5.7.33-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mysql-server-5.7-5.7.33-0ubuntu0.18.04.1.md) | Apr 22, 2021 |
| Linux | mysql-server-8.0 Ubuntu 20.04 LTS (focal) | 8.0.23-0ubuntu0.20.04.1 | [mysql-server-8.0 8.0.23-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-server-8.0-8.0.23-0ubuntu0.20.04.1.md) | Apr 22, 2021 |
| Linux | mysql-server-8.0 Ubuntu 24.10 (oracular) | 8.0.23-1 | [mysql-server-8.0 8.0.23-1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-server-8.0-8.0.23-1.md) | Jan 16, 2026 |
| Linux | mysql-server-core-5.7 Ubuntu 18.04.6 LTS (bionic) | 5.7.33-0ubuntu0.18.04.1 | [mysql-server-core-5.7 5.7.33-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mysql-server-core-5.7-5.7.33-0ubuntu0.18.04.1.md) | Apr 22, 2021 |
| Linux | mysql-server-core-8.0 Ubuntu 20.04 LTS (focal) | 8.0.23-0ubuntu0.20.04.1 | [mysql-server-core-8.0 8.0.23-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-server-core-8.0-8.0.23-0ubuntu0.20.04.1.md) | Apr 22, 2021 |
| Linux | mysql-server-core-8.0 Ubuntu 24.10 (oracular) | 8.0.23-1 | [mysql-server-core-8.0 8.0.23-1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-server-core-8.0-8.0.23-1.md) | Jan 16, 2026 |
| Linux | mysql-source-5.7 Ubuntu 18.04.6 LTS (bionic) | 5.7.33-0ubuntu0.18.04.1 | [mysql-source-5.7 5.7.33-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mysql-source-5.7-5.7.33-0ubuntu0.18.04.1.md) | Apr 22, 2021 |
| Linux | mysql-source-8.0 Ubuntu 20.04 LTS (focal) | 8.0.23-0ubuntu0.20.04.1 | [mysql-source-8.0 8.0.23-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-source-8.0-8.0.23-0ubuntu0.20.04.1.md) | Apr 22, 2021 |
| Linux | mysql-source-8.0 Ubuntu 24.10 (oracular) | 8.0.23-1 | [mysql-source-8.0 8.0.23-1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-source-8.0-8.0.23-1.md) | Jan 16, 2026 |
| Linux | mysql-test RHEL 8 | 0:8.0.26-1.module+el8.4.0+12359+b8928c02 | [RHSA-2021:3590](https://patchblox.com/security/data/fix/linux/rhsa-2021-3590.md) | Sep 21, 2021 |
| Linux | mysql-test ol 8 | 0:8.0.26-1.module+el8.4.0+20311+30d12931 | [ELSA-2021-3590](https://patchblox.com/security/data/fix/linux/elsa-2021-3590.md) | Sep 23, 2021 |
| Linux | mysql-testsuite Ubuntu 18.04.6 LTS (bionic) | 5.7.33-0ubuntu0.18.04.1 | [mysql-testsuite 5.7.33-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mysql-testsuite-5.7.33-0ubuntu0.18.04.1.md) | Apr 22, 2021 |
| Linux | mysql-testsuite Ubuntu 20.04 LTS (focal) | 8.0.23-0ubuntu0.20.04.1 | [mysql-testsuite 8.0.23-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-testsuite-8.0.23-0ubuntu0.20.04.1.md) | Apr 22, 2021 |
| Linux | mysql-testsuite Ubuntu 24.10 (oracular) | 8.0.23-1 | [mysql-testsuite 8.0.23-1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-testsuite-8.0.23-1.md) | Jan 16, 2026 |
| Linux | mysql-testsuite-5.7 Ubuntu 18.04.6 LTS (bionic) | 5.7.33-0ubuntu0.18.04.1 | [mysql-testsuite-5.7 5.7.33-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mysql-testsuite-5.7-5.7.33-0ubuntu0.18.04.1.md) | Apr 22, 2021 |
| Linux | mysql-testsuite-8.0 Ubuntu 20.04 LTS (focal) | 8.0.23-0ubuntu0.20.04.1 | [mysql-testsuite-8.0 8.0.23-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-testsuite-8.0-8.0.23-0ubuntu0.20.04.1.md) | Apr 22, 2021 |
| Linux | mysql-testsuite-8.0 Ubuntu 24.10 (oracular) | 8.0.23-1 | [mysql-testsuite-8.0 8.0.23-1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-testsuite-8.0-8.0.23-1.md) | Jan 16, 2026 |

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Data as of 2026-11-07T12:40:37Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo