# CVE-2024-21055: libmysqlclient21: Vulnerability in the MySQL Server product of Oracle MySQL (component:Server: Optimizer)

CVE-2024-21055 is fixed in 21 products on 1 platform, first by libmysqlclient21 8.0.36-1, released January 17, 2024. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2024-21055
- Priority: High
- CVSS: 7.5 (Medium)
- EPSS: 0.0089
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 20, 2024

## Description

Vulnerability in the MySQL Server product of Oracle MySQL (component:Server: Optimizer).  Supported versions that are affected are 8.0.35 andprior. Easily exploitable vulnerability allows high privileged attackerwith network access via multiple protocols to compromise MySQL Server.Successful attacks of this vulnerability can result in unauthorized abilityto cause a hang or frequently repeatable crash (complete DOS) of MySQLServer. CVSS 3.1 Base Score 4.9 (Availability impacts).  CVSS Vector:(CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libmysqlclient21 Ubuntu 20.04 LTS (focal) | 8.0.36-0ubuntu0.20.04.1 | [libmysqlclient21 8.0.36-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libmysqlclient21-8.0.36-0ubuntu0.20.04.1.md) | Oct 15, 2024 |
| Linux | libmysqlclient21 Ubuntu 22.04.1 LTS (jammy) | 8.0.36-0ubuntu0.22.04.1 | [libmysqlclient21 8.0.36-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libmysqlclient21-8.0.36-0ubuntu0.22.04.1.md) | Oct 15, 2024 |
| Linux | libmysqlclient21 Ubuntu 24.04.5 LTS (noble) | 8.0.36-1 | [libmysqlclient21 8.0.36-1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libmysqlclient21-8.0.36-1.md) | Oct 15, 2024 |
| Linux | libmysqlclient21 Ubuntu 24.10 (oracular) | 8.0.36-1 | [libmysqlclient21 8.0.36-1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-libmysqlclient21-8.0.36-1.md) | Jan 17, 2024 |
| Linux | mecab RHEL 8 | 0:0.996-2.module+el8.9.0+21207+6c20cb3d | [RHSA-2024:0894](https://patchblox.com/security/data/fix/linux/rhsa-2024-0894.md) | Feb 20, 2024 |
| Linux | mecab almalinux 8 | 0.996-2.module_el8.6.0+3340+d764b636 | [ALSA-2024:0894](https://patchblox.com/security/data/fix/linux/alsa-2024-0894.md) | Feb 20, 2024 |
| Linux | mecab rocky 8 | 0:0.996-2.module+el8.10.0+1676+9b4b6e24 | [RLSA-2024:0894](https://patchblox.com/security/data/fix/linux/rlsa-2024-0894.md) | May 7, 2025 |
| Linux | mecab-devel RHEL 8 | 0:0.996-2.module+el8.9.0+21207+6c20cb3d | [RHSA-2024:0894](https://patchblox.com/security/data/fix/linux/rhsa-2024-0894.md) | Feb 20, 2024 |
| Linux | mecab-devel almalinux 8 | 0.996-2.module_el8.6.0+3340+d764b636 | [ALSA-2024:0894](https://patchblox.com/security/data/fix/linux/alsa-2024-0894.md) | Feb 20, 2024 |
| Linux | mecab-ipadic RHEL 8 | 0:2.7.0.20070801-16.module+el8.9.0+21207+6c20cb3d | [RHSA-2024:0894](https://patchblox.com/security/data/fix/linux/rhsa-2024-0894.md) | Feb 20, 2024 |
| Linux | mecab-ipadic almalinux 8 | 2.7.0.20070801-16.module_el8.6.0+3340+d764b636 | [ALSA-2024:0894](https://patchblox.com/security/data/fix/linux/alsa-2024-0894.md) | Feb 20, 2024 |
| Linux | mecab-ipadic rocky 8 | 0:2.7.0.20070801-16.module+el8.10.0+1676+9b4b6e24 | [RLSA-2024:0894](https://patchblox.com/security/data/fix/linux/rlsa-2024-0894.md) | May 7, 2025 |
| Linux | mecab-ipadic-EUCJP RHEL 8 | 0:2.7.0.20070801-16.module+el8.9.0+21207+6c20cb3d | [RHSA-2024:0894](https://patchblox.com/security/data/fix/linux/rhsa-2024-0894.md) | Feb 20, 2024 |
| Linux | mecab-ipadic-EUCJP almalinux 8 | 2.7.0.20070801-16.module_el8.6.0+3340+d764b636 | [ALSA-2024:0894](https://patchblox.com/security/data/fix/linux/alsa-2024-0894.md) | Feb 20, 2024 |
| Linux | mysql RHEL 8 | 0:8.0.36-1.module+el8.9.0+21207+6c20cb3d | [RHSA-2024:0894](https://patchblox.com/security/data/fix/linux/rhsa-2024-0894.md) | Feb 20, 2024 |
| Linux | mysql RHEL 9 | 0:8.0.36-1.el9_3 | [RHSA-2024:1141](https://patchblox.com/security/data/fix/linux/rhsa-2024-1141.md) | Mar 5, 2024 |
| Linux | mysql almalinux 8 | 8.0.36-1.module_el8.9.0+3735+82bd6c11 | [ALSA-2024:0894](https://patchblox.com/security/data/fix/linux/alsa-2024-0894.md) | Feb 20, 2024 |
| Linux | mysql rocky 8 | 0:8.0.36-1.module+el8.10.0+1676+9b4b6e24 | [RLSA-2024:0894](https://patchblox.com/security/data/fix/linux/rlsa-2024-0894.md) | May 7, 2025 |
| Linux | mysql-client Ubuntu 20.04 LTS (focal) | 8.0.36-0ubuntu0.20.04.1 | [mysql-client 8.0.36-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-client-8.0.36-0ubuntu0.20.04.1.md) | Oct 15, 2024 |
| Linux | mysql-client Ubuntu 22.04.1 LTS (jammy) | 8.0.36-0ubuntu0.22.04.1 | [mysql-client 8.0.36-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-mysql-client-8.0.36-0ubuntu0.22.04.1.md) | Oct 15, 2024 |
| Linux | mysql-client Ubuntu 24.04.5 LTS (noble) | 8.0.36-1 | [mysql-client 8.0.36-1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-mysql-client-8.0.36-1.md) | Oct 15, 2024 |
| Linux | mysql-client Ubuntu 24.10 (oracular) | 8.0.36-1 | [mysql-client 8.0.36-1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-client-8.0.36-1.md) | Jan 17, 2024 |
| Linux | mysql-client-8.0 Ubuntu 20.04 LTS (focal) | 8.0.36-0ubuntu0.20.04.1 | [mysql-client-8.0 8.0.36-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-client-8.0-8.0.36-0ubuntu0.20.04.1.md) | Oct 15, 2024 |
| Linux | mysql-client-8.0 Ubuntu 22.04.1 LTS (jammy) | 8.0.36-0ubuntu0.22.04.1 | [mysql-client-8.0 8.0.36-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-mysql-client-8.0-8.0.36-0ubuntu0.22.04.1.md) | Oct 15, 2024 |
| Linux | mysql-client-8.0 Ubuntu 24.04.5 LTS (noble) | 8.0.36-1 | [mysql-client-8.0 8.0.36-1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-mysql-client-8.0-8.0.36-1.md) | Oct 15, 2024 |
| Linux | mysql-client-8.0 Ubuntu 24.10 (oracular) | 8.0.36-1 | [mysql-client-8.0 8.0.36-1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-client-8.0-8.0.36-1.md) | Jan 17, 2024 |
| Linux | mysql-client-core-8.0 Ubuntu 20.04 LTS (focal) | 8.0.36-0ubuntu0.20.04.1 | [mysql-client-core-8.0 8.0.36-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-client-core-8.0-8.0.36-0ubuntu0.20.04.1.md) | Oct 15, 2024 |
| Linux | mysql-client-core-8.0 Ubuntu 22.04.1 LTS (jammy) | 8.0.36-0ubuntu0.22.04.1 | [mysql-client-core-8.0 8.0.36-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-mysql-client-core-8.0-8.0.36-0ubuntu0.22.04.1.md) | Oct 15, 2024 |
| Linux | mysql-client-core-8.0 Ubuntu 24.04.5 LTS (noble) | 8.0.36-1 | [mysql-client-core-8.0 8.0.36-1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-mysql-client-core-8.0-8.0.36-1.md) | Oct 15, 2024 |
| Linux | mysql-client-core-8.0 Ubuntu 24.10 (oracular) | 8.0.36-1 | [mysql-client-core-8.0 8.0.36-1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-client-core-8.0-8.0.36-1.md) | Jan 17, 2024 |
| Linux | mysql-common RHEL 8 | 0:8.0.36-1.module+el8.9.0+21207+6c20cb3d | [RHSA-2024:0894](https://patchblox.com/security/data/fix/linux/rhsa-2024-0894.md) | Feb 20, 2024 |
| Linux | mysql-common RHEL 9 | 0:8.0.36-1.el9_3 | [RHSA-2024:1141](https://patchblox.com/security/data/fix/linux/rhsa-2024-1141.md) | Mar 5, 2024 |
| Linux | mysql-common almalinux 8 | 8.0.36-1.module_el8.9.0+3735+82bd6c11 | [ALSA-2024:0894](https://patchblox.com/security/data/fix/linux/alsa-2024-0894.md) | Feb 20, 2024 |
| Linux | mysql-devel RHEL 8 | 0:8.0.36-1.module+el8.9.0+21207+6c20cb3d | [RHSA-2024:0894](https://patchblox.com/security/data/fix/linux/rhsa-2024-0894.md) | Feb 20, 2024 |
| Linux | mysql-devel RHEL 9 | 0:8.0.36-1.el9_3 | [RHSA-2024:1141](https://patchblox.com/security/data/fix/linux/rhsa-2024-1141.md) | Mar 5, 2024 |
| Linux | mysql-devel almalinux 8 | 8.0.36-1.module_el8.9.0+3735+82bd6c11 | [ALSA-2024:0894](https://patchblox.com/security/data/fix/linux/alsa-2024-0894.md) | Feb 20, 2024 |
| Linux | mysql-errmsg RHEL 8 | 0:8.0.36-1.module+el8.9.0+21207+6c20cb3d | [RHSA-2024:0894](https://patchblox.com/security/data/fix/linux/rhsa-2024-0894.md) | Feb 20, 2024 |
| Linux | mysql-errmsg RHEL 9 | 0:8.0.36-1.el9_3 | [RHSA-2024:1141](https://patchblox.com/security/data/fix/linux/rhsa-2024-1141.md) | Mar 5, 2024 |
| Linux | mysql-errmsg almalinux 8 | 8.0.36-1.module_el8.9.0+3735+82bd6c11 | [ALSA-2024:0894](https://patchblox.com/security/data/fix/linux/alsa-2024-0894.md) | Feb 20, 2024 |
| Linux | mysql-libs RHEL 8 | 0:8.0.36-1.module+el8.9.0+21207+6c20cb3d | [RHSA-2024:0894](https://patchblox.com/security/data/fix/linux/rhsa-2024-0894.md) | Feb 20, 2024 |
| Linux | mysql-libs RHEL 9 | 0:8.0.36-1.el9_3 | [RHSA-2024:1141](https://patchblox.com/security/data/fix/linux/rhsa-2024-1141.md) | Mar 5, 2024 |
| Linux | mysql-libs almalinux 8 | 8.0.36-1.module_el8.9.0+3735+82bd6c11 | [ALSA-2024:0894](https://patchblox.com/security/data/fix/linux/alsa-2024-0894.md) | Feb 20, 2024 |
| Linux | mysql-router Ubuntu 20.04 LTS (focal) | 8.0.36-0ubuntu0.20.04.1 | [mysql-router 8.0.36-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-router-8.0.36-0ubuntu0.20.04.1.md) | Oct 15, 2024 |
| Linux | mysql-router Ubuntu 22.04.1 LTS (jammy) | 8.0.36-0ubuntu0.22.04.1 | [mysql-router 8.0.36-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-mysql-router-8.0.36-0ubuntu0.22.04.1.md) | Oct 15, 2024 |
| Linux | mysql-router Ubuntu 24.04.5 LTS (noble) | 8.0.36-1 | [mysql-router 8.0.36-1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-mysql-router-8.0.36-1.md) | Oct 15, 2024 |
| Linux | mysql-router Ubuntu 24.10 (oracular) | 8.0.36-1 | [mysql-router 8.0.36-1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-router-8.0.36-1.md) | Jan 17, 2024 |
| Linux | mysql-server RHEL 8 | 0:8.0.36-1.module+el8.9.0+21207+6c20cb3d | [RHSA-2024:0894](https://patchblox.com/security/data/fix/linux/rhsa-2024-0894.md) | Feb 20, 2024 |
| Linux | mysql-server RHEL 9 | 0:8.0.36-1.el9_3 | [RHSA-2024:1141](https://patchblox.com/security/data/fix/linux/rhsa-2024-1141.md) | Mar 5, 2024 |
| Linux | mysql-server Ubuntu 20.04 LTS (focal) | 8.0.36-0ubuntu0.20.04.1 | [mysql-server 8.0.36-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-server-8.0.36-0ubuntu0.20.04.1.md) | Oct 15, 2024 |
| Linux | mysql-server Ubuntu 22.04.1 LTS (jammy) | 8.0.36-0ubuntu0.22.04.1 | [mysql-server 8.0.36-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-mysql-server-8.0.36-0ubuntu0.22.04.1.md) | Oct 15, 2024 |
| Linux | mysql-server Ubuntu 24.04.5 LTS (noble) | 8.0.36-1 | [mysql-server 8.0.36-1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-mysql-server-8.0.36-1.md) | Oct 15, 2024 |
| Linux | mysql-server Ubuntu 24.10 (oracular) | 8.0.36-1 | [mysql-server 8.0.36-1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-server-8.0.36-1.md) | Jan 17, 2024 |
| Linux | mysql-server almalinux 8 | 8.0.36-1.module_el8.9.0+3735+82bd6c11 | [ALSA-2024:0894](https://patchblox.com/security/data/fix/linux/alsa-2024-0894.md) | Feb 20, 2024 |
| Linux | mysql-server-8.0 Ubuntu 20.04 LTS (focal) | 8.0.36-0ubuntu0.20.04.1 | [mysql-server-8.0 8.0.36-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-server-8.0-8.0.36-0ubuntu0.20.04.1.md) | Oct 15, 2024 |
| Linux | mysql-server-8.0 Ubuntu 22.04.1 LTS (jammy) | 8.0.36-0ubuntu0.22.04.1 | [mysql-server-8.0 8.0.36-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-mysql-server-8.0-8.0.36-0ubuntu0.22.04.1.md) | Oct 15, 2024 |
| Linux | mysql-server-8.0 Ubuntu 24.04.5 LTS (noble) | 8.0.36-1 | [mysql-server-8.0 8.0.36-1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-mysql-server-8.0-8.0.36-1.md) | Oct 15, 2024 |
| Linux | mysql-server-8.0 Ubuntu 24.10 (oracular) | 8.0.36-1 | [mysql-server-8.0 8.0.36-1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-server-8.0-8.0.36-1.md) | Jan 17, 2024 |
| Linux | mysql-server-core-8.0 Ubuntu 20.04 LTS (focal) | 8.0.36-0ubuntu0.20.04.1 | [mysql-server-core-8.0 8.0.36-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-server-core-8.0-8.0.36-0ubuntu0.20.04.1.md) | Oct 15, 2024 |
| Linux | mysql-server-core-8.0 Ubuntu 22.04.1 LTS (jammy) | 8.0.36-0ubuntu0.22.04.1 | [mysql-server-core-8.0 8.0.36-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-mysql-server-core-8.0-8.0.36-0ubuntu0.22.04.1.md) | Oct 15, 2024 |
| Linux | mysql-server-core-8.0 Ubuntu 24.04.5 LTS (noble) | 8.0.36-1 | [mysql-server-core-8.0 8.0.36-1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-mysql-server-core-8.0-8.0.36-1.md) | Oct 15, 2024 |
| Linux | mysql-server-core-8.0 Ubuntu 24.10 (oracular) | 8.0.36-1 | [mysql-server-core-8.0 8.0.36-1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-server-core-8.0-8.0.36-1.md) | Jan 17, 2024 |
| Linux | mysql-source-8.0 Ubuntu 20.04 LTS (focal) | 8.0.36-0ubuntu0.20.04.1 | [mysql-source-8.0 8.0.36-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-source-8.0-8.0.36-0ubuntu0.20.04.1.md) | Oct 15, 2024 |
| Linux | mysql-source-8.0 Ubuntu 22.04.1 LTS (jammy) | 8.0.36-0ubuntu0.22.04.1 | [mysql-source-8.0 8.0.36-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-mysql-source-8.0-8.0.36-0ubuntu0.22.04.1.md) | Oct 15, 2024 |
| Linux | mysql-source-8.0 Ubuntu 24.04.5 LTS (noble) | 8.0.36-1 | [mysql-source-8.0 8.0.36-1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-mysql-source-8.0-8.0.36-1.md) | Oct 15, 2024 |
| Linux | mysql-source-8.0 Ubuntu 24.10 (oracular) | 8.0.36-1 | [mysql-source-8.0 8.0.36-1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-source-8.0-8.0.36-1.md) | Jan 17, 2024 |
| Linux | mysql-test RHEL 8 | 0:8.0.36-1.module+el8.9.0+21207+6c20cb3d | [RHSA-2024:0894](https://patchblox.com/security/data/fix/linux/rhsa-2024-0894.md) | Feb 20, 2024 |
| Linux | mysql-test RHEL 9 | 0:8.0.36-1.el9_3 | [RHSA-2024:1141](https://patchblox.com/security/data/fix/linux/rhsa-2024-1141.md) | Mar 5, 2024 |
| Linux | mysql-test almalinux 8 | 8.0.36-1.module_el8.9.0+3735+82bd6c11 | [ALSA-2024:0894](https://patchblox.com/security/data/fix/linux/alsa-2024-0894.md) | Feb 20, 2024 |
| Linux | mysql-testsuite Ubuntu 20.04 LTS (focal) | 8.0.36-0ubuntu0.20.04.1 | [mysql-testsuite 8.0.36-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-testsuite-8.0.36-0ubuntu0.20.04.1.md) | Oct 15, 2024 |
| Linux | mysql-testsuite Ubuntu 22.04.1 LTS (jammy) | 8.0.36-0ubuntu0.22.04.1 | [mysql-testsuite 8.0.36-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-mysql-testsuite-8.0.36-0ubuntu0.22.04.1.md) | Oct 15, 2024 |
| Linux | mysql-testsuite Ubuntu 24.04.5 LTS (noble) | 8.0.36-1 | [mysql-testsuite 8.0.36-1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-mysql-testsuite-8.0.36-1.md) | Oct 15, 2024 |
| Linux | mysql-testsuite Ubuntu 24.10 (oracular) | 8.0.36-1 | [mysql-testsuite 8.0.36-1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-testsuite-8.0.36-1.md) | Jan 17, 2024 |
| Linux | mysql-testsuite-8.0 Ubuntu 20.04 LTS (focal) | 8.0.36-0ubuntu0.20.04.1 | [mysql-testsuite-8.0 8.0.36-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mysql-testsuite-8.0-8.0.36-0ubuntu0.20.04.1.md) | Oct 15, 2024 |
| Linux | mysql-testsuite-8.0 Ubuntu 22.04.1 LTS (jammy) | 8.0.36-0ubuntu0.22.04.1 | [mysql-testsuite-8.0 8.0.36-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-mysql-testsuite-8.0-8.0.36-0ubuntu0.22.04.1.md) | Oct 15, 2024 |
| Linux | mysql-testsuite-8.0 Ubuntu 24.04.5 LTS (noble) | 8.0.36-1 | [mysql-testsuite-8.0 8.0.36-1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-mysql-testsuite-8.0-8.0.36-1.md) | Oct 15, 2024 |
| Linux | mysql-testsuite-8.0 Ubuntu 24.10 (oracular) | 8.0.36-1 | [mysql-testsuite-8.0 8.0.36-1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-mysql-testsuite-8.0-8.0.36-1.md) | Jan 17, 2024 |

---

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