A vulnerability in Oracle MySQL Server's InnoDB component affects versions 8.0.40 and prior, 8.4.3 and prior, and 9.1.0 and prior. It allows a high-privileged attacker with network access to cause a denial of service via server hang or crash and unauthorized modification of some accessible data. The CVSS 3.1 base score is 5.5, indicating a medium severity impact on integrity and availability.