CVE-2026-83636: Windows Hyper-V Denial of Service Vulnerability
Null pointer dereference in Windows Hyper-V allows an authorized attacker to deny service locally.
Other sources
Windows Hyper-V Denial of Service Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.33650Patch KB5126646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.28000.3231Patch KB5127646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.22631.7652Patch KB5126653 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26200.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.19044.7807Patch KB5126657 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.20348.5761Patch KB5126655 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26300.9711Patch KB5127648
Event History
Frequently Asked Questions
Who can exploit this vulnerability?
An attacker must already be authorized on the affected system and able to act locally. The provided information does not indicate that remote exploitation is possible.
What is the expected impact of successful exploitation?
Successful exploitation can deny service through Windows Hyper-V. The supplied severity vector indicates no confidentiality or integrity impact, while availability impact is high.
Which systems should be reviewed?
Review systems running Microsoft Windows 10, Windows 11, Windows Server 2022, Windows Server 2025, or Microsoft Windows Hyper-V. The provided data does not identify affected build numbers or patch levels.