CVE-2025-21521

mysql: MySQL Server: Denial of service in Thread Pooling component

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Severity

Important

Red Hat Product Security

7.5

CVSS 3.1

Review impact separately from score.

Published · January 22, 2025

Updated · November 4, 2026

Description

A flaw was found in MySQL Server (Thread Pooling component). This vulnerability allows a denial of service (DoS) via network access through multiple protocols by an unauthenticated attacker.

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

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-835 · Loop with Unreachable Exit Condition