Denial of Service Vulnerability in MySQL Server by Oracle
CVE-2025-53042

4.9MEDIUM

Key Information:

Vendor

Oracle
Status
Mysql Server
Vendor
CVE Published:
21 October 2025

What is CVE-2025-53042?

An identified vulnerability in Oracle's MySQL Server allows a high-privileged attacker with network access to exploit the optimizer component. This easily exploitable vulnerability could enable unauthorized users to provoke a hang or lead to a frequently repeatable crash of the MySQL Server, effectively causing a denial of service. Affected versions include 8.0.0 through 8.0.43, 8.4.0 through 8.4.6, and 9.0.0 through 9.4.0. Security measures should be taken immediately to mitigate these risks and safeguard server availability.

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Affected Version(s)

MySQL Server 8.0.0 <= 8.0.43

MySQL Server 8.4.0 <= 8.4.6

MySQL Server 9.0.0 <= 9.4.0

References

https://www.oracle.com/security-alerts/cpuoct2025.html
vendor-advisory

CVSS V3.1

Score:
4.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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