Medium6.8Microsoft Server

Medium [CVE-2021-42274] Windows Hyper-V Discrete Device Assignment (DDA) Denial of Service Vulnerability

This medium-severity Microsoft Server advisory covers CVE-2021-42274 affecting Windows Server 2016 (Server Core installation), Windows Server 2019 (Server Core installation), Windows Server 2022.

CVE-2021-42274 Published Nov 10, 2021Updated by vendor Aug 19, 2026

CVE-2021-42274

Affected products & platforms

Microsoft ServerWindows Server

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Summary

Windows Hyper-V Discrete Device Assignment (DDA) Denial of Service Vulnerability

Affected products named by the advisory: Windows Server 2016; Windows Server 2016 (Server Core installation); Windows Server 2019; Windows Server 2019 (Server Core installation); and 3 more.

Affected products named by the advisory: Windows Server 2022; Windows Server version 2004; Windows Server version 20H2.

Affected versions

Windows 10 Version 1607 10.0.14393.0 before 10.0.14393.4770
Windows 10 Version 1809 10.0.17763.0 before 10.0.17763.2300
Windows 10 Version 2004 10.0.0 before 10.0.19041.1348
Windows 10 Version 21H1 10.0.0 before 10.0.19043.1348
Windows 11 version 21H2 10.0.22000.0 before 10.0.22000.318
Windows Server 2016 10.0.14393.0 before 10.0.14393.4770
Windows Server 2016 (Server Core installation) 10.0.14393.0 before 10.0.14393.4770
Windows Server 2019 10.0.17763.0 before 10.0.17763.2300
Windows Server 2019 (Server Core installation) 10.0.17763.0 before 10.0.17763.2300
Windows Server 2022 10.0.20348.0 before 10.0.20348.350
Windows Server version 2004 10.0.0 before 10.0.19041.1348
Windows Server version 20H2 10.0.0 before 10.0.19041.1348

Official advisory · high-confidence parse· fetched 2 hours ago·verify at source

Fixed versions

10.0.14393.4770
10.0.17763.2300
10.0.19041.1348
10.0.19043.1348
10.0.22000.318
10.0.20348.350

Official advisory · high-confidence parse· fetched 2 hours ago·verify at source

Mitigation

Upgrade to a fixed release: 10.0.14393.4770, 10.0.17763.2300, 10.0.19041.1348, 10.0.19043.1348, 10.0.22000.318, 10.0.20348.350. That is the remediation for this advisory.

The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.

Official advisory · high-confidence parse· fetched 2 hours ago·verify at source

Discussion(0)

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