Actively exploited
Listed in CISA’s Known Exploited Vulnerabilities catalog since March 3, 2025.
CVE-2018-8639
Microsoft Windows Win32k Improper Resource Shutdown or Release Vulnerability
Added to KEV March 3, 2025
Alert details
- Source feed
- CISA KEV
- CVE ID
- CVE-2018-8639
- CWE
- CWE-404
- Affected products
- Windows · Microsoft Windows · Microsoft
What happened
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.
What it means for your business
Microsoft Windows is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2018-8639). 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. CISA remediation due date: 2025-03-24. If you need help checking exposure, call (864) 335-9223.
Required 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 due date: March 24, 2025
Sources
Related briefs
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