An elevation of privilege vulnerability exists in the way that the Windows Kernel handles objects in memory, aka 'Windows Kernel Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2020-0669, CVE-2020-0670, CVE-2020-0671, CVE-2020-0672.
https://www.zerodayinitiative.com/advisories/ZDI-20-257/
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0668