CVE-2025-53040

[CVE catalog]

Severity

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

Published

Oct 21, 2025, 8:02:54 PM UTC

Source

[NVD] · [CVE record]

EPSS

0.58% · Oct 25, 2026

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are 8.0.0-8.0.43, 8.4.0-8.4.6 and 9.0.0-9.4.0. Easily exploitable vulnerability allows high privileged attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.1 Base Score 4.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H). mysql: Optimizer unspecified vulnerability (CPU Oct 2025) A moderate severity denial-of-service vulnerability was found in the MySQL Server Optimizer component of Oracle MySQL. A remote attacker with high privileges and network access via multiple protocols could exploit this flaw to cause a hang or frequently repeatable crash of MySQL Server, resulting in a complete denial of service. Upstream, this issue affects MySQL Server 8.0.0-8.0.43, 8.4.0-8.4.6, and 9.0.0-9.4.0. In Red Hat's offerings, the mysql 8.0 and mysql 8.4 packages in Red Hat Enterprise Linux 8, 9, and 10 are affected and fixes are being pursued through Red Hat updates; the mysql packages in Fedora are likewise affected. The mysql package in Red Hat Enterprise Linux 6 Extended Lifecycle Support is not affected because the vulnerable code is not present. Red Hat rates this flaw moderate severity (CVSS 3.1 base score 4.9, AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H), consistent with the upstream Oracle assessment. 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.