Sddm Project

SDDM is a lightweight display manager for Linux desktop environments that handles user authentication and session initialization at the graphical login layer. Its narrow, specialized focus on authentication and session management yields recurring vulnerabilities centered on race conditions in shared resources, improper authentication logic, insufficient session expiration controls, and missing authentication checks on critical functions—weaknesses that directly reflect the sensitive nature of login infrastructure. Current severity, exploitation activity, and exposure counts are shown alongside this summary.