CVE-2025-21543

mysql: MySQL Server: Denial of Service via network access

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Severity

Moderate

Red Hat Product Security

4.9

CVSS 3.1

Review impact separately from score.

Published · January 22, 2025

Updated · September 1, 2026

Description

A flaw was found in MySQL Server. This vulnerability allows unauthorized remote attacker to cause a denial of service (DoS).

Statement

Red Hat ships MySQL Server in Red Hat Enterprise Linux. This vulnerability has been addressed through regular MySQL release updates.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

Restrict network access to the MySQL Server to trusted clients only.

CVSS / CWE

CVSS 3.1 · 4.9
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

CWE-20 · Improper Input Validation