CVE-2017-3642: Vulnerability in the MySQL Server component of Oracle MySQL (subcomponent: Server: Optimizer).

Security readout for executives and security teams

This is a denial-of-service issue in Oracle MySQL Server's optimizer. In affected MySQL 5.7.18 and earlier, a highly privileged user who can reach the database over the network could cause the server to hang or repeatedly crash. The stated impact is loss of availability, not data theft or modification. Exposure is most likely where MySQL Server 5.7.18 or earlier remains deployed and reachable by privileged database users or administrative accounts over network protocols. Systems without affected MySQL versions are not indicated as exposed by the supplied sources. Prioritize remediation for production databases still running affected MySQL versions, especially where downtime would disrupt customer-facing services or critical operations. Urgency is moderate because exploitation requires high privileges, but the successful impact is complete database denial of service. Mitigation focus: Upgrade affected MySQL Server deployments using Oracle CPU guidance or vendor-fixed packages.; Review Red Hat advisory applicability for systems consuming Red Hat MySQL-related packages.; Restrict MySQL network access to trusted administrative paths and required application hosts..

Prepared

Jun 12, 2026, 21:41 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.