CVE-2026-69978: Microsoft Windows VMSwitch Denial of Service Vulnerability
Microsoft Windows VMSwitch Denial of Service Vulnerability
Other sources
Null pointer dereference in Windows VMSwitch allows an authorized attacker to deny service locally.
— 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 10.0.19044.7807Patch KB5126657 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26300.9711Patch KB5127648 - 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 10.0.26200.9711Patch 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 10.0.17763.9376Patch KB5126651 - 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 10.0.28000.3231Patch KB5127646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.20348.5761Patch KB5126655
Event History
Frequently Asked Questions
Which systems should be prioritized for triage?
The affected software list includes Microsoft Windows 10, Windows 11, Windows Server 2019, Windows Server 2022, Windows Server 2025, and Microsoft Windows VMSwitch.
What level of access does an attacker need?
Exploitation requires local access and low privileges. No user interaction is required, but the attack complexity is rated high.
What is the expected security impact?
The reported impact is primarily availability loss, rated high. Confidentiality and integrity impacts are rated none, while the CVSS vector indicates the impact may extend beyond the initially affected security authority.