CISA description
A privilege escalation vulnerability exists when Windows improperly handles calls to Win32k.sys. An attacker who successfully exploited this vulnerability could run remote code in the security context of the local system.
CVE-2018-8589
Microsoft · Win32k
Microsoft Win32k Privilege Escalation Vulnerability
Required action
Apply updates per vendor instructions.
Notes & references
Where this lands in 800-53
Vulnerability data triggers these controls during assessment and continuous monitoring.