An information disclosure vulnerability exists in the way that the Windows Graphics Device Interface (GDI) handles objects in memory, allowing an attacker to retrieve information from a targeted system, aka 'Windows GDI Information Disclosure Vulnerability'.
https://www.zerodayinitiative.com/advisories/ZDI-20-578/
https://www.zerodayinitiative.com/advisories/ZDI-20-552/
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0744