# RHSA-2026:4162: mysql8.4 security update

RHSA-2026:4162, released January 20, 2026, fixes 6 CVEs in mysql8.4 (version 8.4.8-1.el10_1). None of them is reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2026-4162
- Platform: Linux
- Released: Jan 20, 2026
- Priority: Routine (Closes 6 CVEs, none high severity)
- CVEs: 6, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2026:4162

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [mysql8.4](https://patchblox.com/security/data/product/linux/mysql8.4.md) | RHEL 10 | 8.4.8-1.el10_1 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-21964](https://patchblox.com/security/data/cve/CVE-2026-21964.md) | Routine | mysql8.4: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Thread Pooling) | 6.5 | 0.0040 |  |
| [CVE-2026-21936](https://patchblox.com/security/data/cve/CVE-2026-21936.md) | Routine | mysql-testsuite: Vulnerability in the MySQL Server product of Oracle MySQL (component: InnoDB) | 6.5 | 0.0040 |  |
| [CVE-2026-21937](https://patchblox.com/security/data/cve/CVE-2026-21937.md) | Routine | libmysqlclient24: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: DDL) | 6.5 | 0.0040 |  |
| [CVE-2026-21941](https://patchblox.com/security/data/cve/CVE-2026-21941.md) | Routine | mysql8.4: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer) | 6.5 | 0.0040 |  |
| [CVE-2026-21948](https://patchblox.com/security/data/cve/CVE-2026-21948.md) | Routine | mysql8.4: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer) | 6.5 | 0.0040 |  |
| [CVE-2026-21968](https://patchblox.com/security/data/cve/CVE-2026-21968.md) | Routine | galera: MariaDB is a multi-user, multi-threaded SQL database server that is binary compatible with MySQL | 6.5 | 0.0031 |  |

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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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo