Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Client programs). Supported versions that are affected are MySQL Server: 8.4.0-8.4.12, 9.7.0-9.7.3, 26.7.0-26.7.1; MySQL Cluster: 8.0.0-8.0.49, 8.4.0-8.4.12, 9.7.0-9.7.3 and 26.7.0-26.7.1. Difficult to exploit vulnerability allows high privileged attacker with network access via multiple protocols to compromise MySQL Server, MySQL Cluster. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server, MySQL Cluster. CVSS 3.1 Base Score 4.4 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H).

A flaw was found in MySQL client programs. A remote attacker with high privileges and network access can exploit this vulnerability to compromise the system. Successful exploitation allows the attacker to cause the database server to hang or repeatedly crash, resulting in a complete Denial of Service (DoS).

Red Hat Product Security has evaluated this vulnerability as Moderate because successful exploitation requires an attacker to possess elevated database credentials and overcome high attack complexity to disrupt service availability, preventing widespread unauthenticated exploitation. Although triggering the flaw can cause the database daemon to crash or become unresponsive, typical Red Hat Enterprise Linux deployments restrict database network access and avoid exposing management accounts to untrusted endpoints. Consequently, the blast radius is largely confined to environments where administrative permissions are already compromised. Red Hat Enterprise Linux 10 Affected mysql8.4 Red Hat Enterprise Linux 6 Not affected mysql Red Hat Enterprise Linux 9 Affected mysql Red Hat Hardened Images Not affected mariadb10.11 Red Hat Hardened Images Not affected mariadb11.8 https://www.cve.org/CVERecord?id=CVE-2026-101754 https://nvd.nist.gov/vuln/detail/CVE-2026-101754 https://www.oracle.com/security-alerts/cpuoct2026.html