CVE-2026-96965: Microsoft Windows Hyper-V null pointer dereference DoS

CVE-2026-96965 · Severity: medium · CVSS 5.3 · Published 2026-11-10

Windows Hyper-V, Microsoft's virtualization platform for running virtual machines on Windows servers, contains a null pointer dereference flaw. An authorized user with access to a Hyper-V host can exploit this to crash the hypervisor, disrupting all virtual machines running on that host and causing service outages.

Technologies: Microsoft Windows Hyper-V. Vendors: Microsoft.

Quick answers

Is CVE-2026-96965 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-96965 being exploited in the wild.
How severe is CVE-2026-96965?
Medium severity, with a CVSS score of 5.3, published 10 November 2026.
Which products and versions are affected?
Microsoft Windows Hyper-V.
Is there a fix for CVE-2026-96965?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-96965 attacked?
It is attacked with local access, in an operating system.
Am I affected by CVE-2026-96965?
Check whether you run Microsoft Windows Hyper-V. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A null pointer dereference vulnerability in Windows Hyper-V allows an authenticated attacker to trigger a denial of service condition through a local attack vector. The flaw requires valid access to the Hyper-V host to trigger. Exploitation crashes the hypervisor process, denying service to all dependent virtual machines. Microsoft has patched this vulnerability.

Affected products

  • Microsoft Windows Hyper-V

Timeline

  • 2026-11-10: disclosed

References

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