RHSA-2026:6391: Security update for 12 packages

RHSA-2026:6391, released April 15, 2026, fixes 6 CVEs across 12 products. 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
mecab	RHEL 8	0:0.996-2.module+el8.10.0+23550+bd321b9a
mecab-devel	RHEL 8	0:0.996-2.module+el8.10.0+23550+bd321b9a
mecab-ipadic	RHEL 8	0:2.7.0.20070801-17.module+el8.10.0+23550+bd321b9a
mecab-ipadic-EUCJP	RHEL 8	0:2.7.0.20070801-17.module+el8.10.0+23550+bd321b9a
mysql	RHEL 8	0:8.4.8-1.module+el8.10.0+24007+c07a67f2
mysql-common	RHEL 8	0:8.4.8-1.module+el8.10.0+24007+c07a67f2
mysql-devel	RHEL 8	0:8.4.8-1.module+el8.10.0+24007+c07a67f2
mysql-errmsg	RHEL 8	0:8.4.8-1.module+el8.10.0+24007+c07a67f2
mysql-libs	RHEL 8	0:8.4.8-1.module+el8.10.0+24007+c07a67f2
mysql-server	RHEL 8	0:8.4.8-1.module+el8.10.0+24007+c07a67f2
mysql-test	RHEL 8	0:8.4.8-1.module+el8.10.0+24007+c07a67f2
mysql-test-data	RHEL 8	0:8.4.8-1.module+el8.10.0+24007+c07a67f2

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://access.redhat.com/errata/RHSA-2026:6391

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