An information disclosure vulnerability exists when the Windows kernel improperly initializes objects in memory.To exploit this vulnerability, an authenticated attacker could run a specially crafted application, aka 'Windows Kernel Information Disclosure Vulnerability'. This CVE ID is unique from CVE-2019-0621, CVE-2019-0661.
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0663