A vulnerability exists in the Oracle MySQL Server component 'Optimizer' affecting versions 8.0.39 and prior, 8.4.2 and prior, and 9.0.1 and prior. This vulnerability allows a high privileged attacker with network access to cause a denial of service by hanging or crashing the MySQL Server. The CVSS 3.1 base score is 4.9, indicating a medium severity impact focused on availability.