CVE-2026-101607

A flaw was found in the MySQL Server optimizer component. A remote attacker with high privileges and network access can exploit this vulnerability through multiple protocols to cause the service to hang or crash repeatedly. Successful exploitation results in a complete Denial of Service (DoS), making the database unavailable to legitimate users.

Red Hat has evaluated this vulnerability as having a Moderate severity impact because successful exploitation requires an attacker to possess elevated administrative privileges within the database instance, confining the threat to trusted or already compromised accounts. Although a privileged user can trigger an unexpected service termination or unresponsive state within the MySQL query optimizer daemon, the flaw cannot be leveraged to access confidential records or modify database data. Deployments that restrict administrative access and do not expose database ports to untrusted networks face substantially reduced exposure.

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.