CVE-2021-28476CriticalCVSS 9.9

Windows Hyper-V Remote Code Execution Vulnerability

Published
May 11, 2021
Last Modified
—

🔗 CVE IDs covered (1)

CVE-2021-28476 →

📋 Description

Under what circumstances might this vulnerability be exploited other than as a denial of service attack against a Hyper-V host? This issue allows a guest VM to force the Hyper-V host's kernel to read from an arbitrary, potentially invalid address. The contents of the address read would not be returned to the guest VM. In most circumstances, this would result in a denial of service of the Hyper-V host (bugcheck) due to reading an unmapped address. It is possible to read from a memory mapped device register corresponding to a hardware device attached to the Hyper-V host which may trigger additional, hardware device specific side effects that could compromise the Hyper-V host's security.

🎯 Affected products23

  • Windows 10 Version 1607 for x64-based Systems
  • Windows 10 Version 1803 for x64-based Systems
  • Windows 10 Version 1809 for x64-based Systems
  • Windows 10 Version 1909 for x64-based Systems
  • Windows 10 Version 2004 for x64-based Systems
  • Windows 10 for x64-based Systems
  • Windows 7 for x64-based Systems Service Pack 1
  • Windows 8.1 for x64-based systems
  • Windows Server 2008 R2 for x64-based Systems Service Pack 1
  • Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
  • Windows Server 2008 for x64-based Systems Service Pack 2
  • Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)
  • Windows Server 2012
  • Windows Server 2012 (Server Core installation)
  • Windows Server 2012 R2
  • Windows Server 2012 R2 (Server Core installation)
  • Windows Server 2016
  • Windows Server 2016 (Server Core installation)
  • Windows Server 2019
  • Windows Server 2019 (Server Core installation)
  • Windows Server, version 1909 (Server Core installation)
  • Windows Server, version 2004 (Server Core installation)
  • Windows Server, version 20H2 (Server Core Installation)

✅ Remediation

KB5003174 (Security Update) — fixed build 10.0.17134.2207 KB5003171 (Security Update) — fixed build 10.0.17763.1935 KB5003169 (Security Update) — fixed build 10.0.18363.1556 KB5003173 (Security Update) — fixed build 10.0.19041.982 KB5003173 (Security Update) — fixed build 10.0.19042.982 KB5003172 (Security Update) — fixed build 10.0.10240.18931 KB5003197 (Security Update) — fixed build 10.0.14393.4401 KB5003233 (Monthly Rollup) — fixed build 6.1.7601.24597 KB5003228 (Security Only) — fixed build 6.1.7601.24598 KB5003209 (Monthly Rollup) — fixed build 6.3.9600.20017 KB5003220 (Security Only) — fixed build 6.3.9600.20017 KB5003210 (Monthly Rollup) — fixed build 6.0.6003.21117 KB5003225 (Security Only) — fixed build 6.0.6003.21117 KB5003208 (Monthly Rollup) — fixed build 6.2.9200.23347 KB5003203 (Security Only) — fixed build 6.2.9200.23347

🔗 References (27)