RLSA-2026:4162: mysql8.4 security update

RLSA-2026:4162, released May 21, 2026, fixes 6 CVEs in mysql8.4 (version 0:8.4.8-1.el10_1.rocky.0.1). None of them is reported as exploited. Patch Radar priority: Routine.

Routine

CVEs closed

None rated Critical

Exploited

None reported

Highest CVSS

6.5

Base score, 0 to 10

Highest EPSS

0.0040

34th percentile

Priority of the 6 CVEs

Patch now 0
                                Urgent 0
                                High 0
                                Routine 6

Fixed package versions

Product	Release	Fixed in
mysql8.4	rocky 10	0:8.4.8-1.el10_1.rocky.0.1

CVEs this fix closes

Priority	CVE	Title	CVSS	EPSS	Exploitation
Routine	CVE-2026-21964	mysql8.4: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Thread Pooling)	6.5	0.0040	None reported
Routine	CVE-2026-21936	mysql-testsuite: Vulnerability in the MySQL Server product of Oracle MySQL (component: InnoDB)	6.5	0.0040	None reported
Routine	CVE-2026-21937	libmysqlclient24: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: DDL)	6.5	0.0040	None reported
Routine	CVE-2026-21941	mysql8.4: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer)	6.5	0.0040	None reported
Routine	CVE-2026-21948	mysql8.4: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer)	6.5	0.0040	None reported
Routine	CVE-2026-21968	galera: MariaDB is a multi-user, multi-threaded SQL database server that is binary compatible with MySQL	6.5	0.0031	None reported

Also fixes CVE-2026-21964

libmysqlclient21 8.0.45-0ubuntu0.20.04.1+esm2
libmysqlclient21 on Ubuntu 20.04 LTS (focal)
mysql-client 8.0.45-0ubuntu0.20.04.1+esm2
mysql-client on Ubuntu 20.04 LTS (focal)
mysql-client-8.0 8.0.45-0ubuntu0.20.04.1+esm2
mysql-client-8.0 on Ubuntu 20.04 LTS (focal)
mysql-client-core-8.0 8.0.45-0ubuntu0.20.04.1+esm2
mysql-client-core-8.0 on Ubuntu 20.04 LTS (focal)
mysql-router 8.0.45-0ubuntu0.20.04.1+esm2
mysql-router on Ubuntu 20.04 LTS (focal)
mysql-server 8.0.45-0ubuntu0.20.04.1+esm2
mysql-server on Ubuntu 20.04 LTS (focal)
mysql-server-8.0 8.0.45-0ubuntu0.20.04.1+esm2
mysql-server-8.0 on Ubuntu 20.04 LTS (focal)
mysql-server-core-8.0 8.0.45-0ubuntu0.20.04.1+esm2
mysql-server-core-8.0 on Ubuntu 20.04 LTS (focal)

Vendor advisory

https://errata.rockylinux.org/RLSA-2026:4162

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