Improper input validation in MySQL Server - CVE-2025-21588

Vulnerability identifier: #VU107541

CSH Severity: Medium

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-21588

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote privileged user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper input validation within the Server: DML component in MySQL Server. A remote privileged user can exploit this vulnerability to perform a denial of service (DoS) attack.

MySQL Server
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for ARM 64
Ubuntu
mysql-selinux (Red Hat package)
mysql-server-8.0 (Ubuntu package)
mysql-server (Ubuntu package)
mysql8.4 (Red Hat package)

Install updates from vendor's website.

MySQL Server - addressed in versions 8.4.5, 9.3.0
mysql-selinux (Red Hat package) - update to 1.0.14-1.el10_0
mysql-server-8.0 (Ubuntu package) - addressed in versions 8.0.42-0ubuntu0.20.04.1, 8.0.42-0ubuntu0.22.04.1, 8.0.42-0ubuntu0.24.04.1, 8.0.42-0ubuntu0.24.10.1
mysql-server (Ubuntu package) - update to 8.4.5-0ubuntu0.1
mysql8.4 (Red Hat package) - update to 8.4.6-2.el10_0

• https://www.oracle.com/security-alerts/cpuapr2025.html

• Multiple vulnerabilities in MySQL Server
• Ubuntu update for mysql-8.0
• Red Hat Enterprise Linux 9 update for the mysql:8.4 module
• Red Hat Enterprise Linux 10 update for multiple packages