An information disclosure vulnerability exists when Windows Subsystem for Linux improperly handles objects in memory. An attacker who successfully exploited this vulnerability could obtain information to further compromise the user’s system. A attacker could exploit this vulnerability by running a specially crafted application. The update addresses the vulnerability by correcting how Windows Subsystem for Linux handles objects in memory.
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1075
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1075