CVE-2021-42274
MediumCVSS 6.8Exploitation Probability (EPSS)
Low risk46th percentile - higher than 46% of all known CVEs
Summary
Windows Hyper-V Discrete Device Assignment (DDA) Denial of Service Vulnerability.
Risk Assessment
An attacker could cause a denial of service, potentially leading to disruption of critical applications and reduced availability.
Recommendation
Apply security updates provided by Microsoft for Windows to remediate the vulnerability.
Other vulnerabilities in Windows Hyper-V
See all- CVE-2026-96223High
A use-after-free vulnerability in Windows Hyper-V allows an authorized attacker to elevate privileges locally.
- CVE-2017-8714High
The Hyper-V component on Microsoft Windows 8.1, Windows Server 2012 Gold and R2, Windows 10 1607, and Windows Server 2016 has a vulnerability allowing remote code execution when it fails to properly validate input from an authenticated user on a guest operating system.
- CVE-2017-8664High
A vulnerability in Windows Hyper-V allows remote code execution when the system fails to properly validate input from a privileged user on a guest operating system.
- CVE-2017-0193High
A vulnerability in Windows Hyper-V allows an attacker to gain elevated privileges on a target guest operating system when Hyper-V instruction emulation fails to properly enforce privilege levels.
- CVE-2017-0212High
Windows Hyper-V contains a vulnerability that allows for elevation of privilege when Microsoft Windows 10 Gold, 1511, 1607, 1703, and Windows Server 2016 fail to properly validate vSMB packet data.
- CVE-2026-69910Critical
Stack-based buffer overflow in Windows Hyper-V allows an unauthorized attacker to execute code remotely over a network.
- CVE-2026-40402Critical
A use after free vulnerability in Windows Hyper-V allows an unauthorized attacker to elevate privileges locally.
- CVE-2025-21335HighActively exploited
A vulnerability in Windows Hyper-V NT Kernel Integration VSP allows for elevation of privilege. Technical details are not provided in the description.
- CVE-2025-21334HighActively exploited
A vulnerability in Windows Hyper-V NT Kernel Integration VSP allows for elevation of privilege. Technical details are not provided in the description.
- CVE-2025-21333HighActively exploited
A vulnerability in Windows Hyper-V NT Kernel Integration VSP allows for elevation of privilege. Technical details are not provided in the description.
Original NVD description (English source)
Windows Hyper-V Discrete Device Assignment (DDA) Denial of Service Vulnerability
Vulnerability data from NVD (NIST) · CISA KEV · EPSS