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Not yet scored Actively exploited Used in ransomware

CVE-2018-8639

Microsoft Windows Win32k Improper Resource Shutdown or Release Vulnerability

Description

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.

Recommended action

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

CISA remediation due date for U.S. federal agencies: 24 Mar 2025.

Collected automatically from public sources. Verify affected versions and fixes in the vendor's notice before acting.