Microsoft Windows Win32k Improper Resource Shutdown or Release Vulnerability
An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory, aka "Win32k Elevation of Privilege Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT…
Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.
Exploitation probability EPSS · FIRST
Exploitation signals 4 / 5
- KEV catalog (CISA)03 Mar 2025
- Exploited in EUVD (ENISA)03 Mar 2025
- Used by ransomwareyes
- EPSS above 10 %22.2%
- No account, over the networkno
What to do
Fix
Apply the vendor’s fix as soon as it is available.
CISA guidance: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Meanwhile
Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.
Manufacturers (CRA)
Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained
Description ENISA EUVD
An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory, aka "Win32k Elevation of Privilege Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2019, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers. This CVE ID is unique from CVE-2018-8641.
Affected products
- Itanium-Based Systems Service Pack 2
- 32-bit Systems Service Pack 2 (Server Core installation)
- 32-bit Systems
- version 1709 (Server Core Installation)
- Version 1809 for 32-bit Systems
- Version 1809 for ARM64-based Systems
- Version 1709 for 32-bit Systems
- Version 1803 for ARM64-based Systems
- Version 1703 for x64-based Systems
- Windows RT 8.1
- 32-bit systems
- Version 1607 for 32-bit Systems
Open source packages OSV
Affected libraries according to OSV, with fixed versions.
Timeline
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Published
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Exploitation reported (ENISA)
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Added to the KEV catalog
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CISA remediation due date
-
EPSS peak: 22.2%
References
Other exploited vulnerabilities from the same vendor
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