CVE-2018-8639This vulnerability is part of CISA's Known Exploited Vulnerabilities (KEV) catalog, indicating active exploitation in the wild. It has been observed in ransomware campaigns.
Microsoft Windows Win32k contains an improper resource shutdown or release vulnerability that allows for local, authenticated privilege escalation. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode.
Microsoft
Windows
See vendor advisoryThis vulnerability was identified in Windows by Microsoft. Microsoft Windows Win32k contains an improper resource shutdown or release vulnerability that allows for local, authenticated privilege escalation. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode.
High - Known ransomware exploitation
Complete system compromise possible
https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2018-8639 ; https://nvd.nist.gov/vuln/detail/CVE-2018-8639
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Due Date: 3/24/2025