A vulnerability in the Oracle MySQL Server optimizer component affects multiple supported versions including 8.0.0 through 8.0.41, 8.4.0 through 8.4.4, and 9.0.0 through 9.2.0. This flaw allows a low-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 6.5, indicating a medium severity impact focused on availability.