EUVD-2026-73473
GHSA-rv4j-wfjx-q9rh
Severity by source
AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Local kernel driver crash extends to full OS outage (S:C/A:H); PR:N because no elevated privileges are required to invoke the affected VHD driver path.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.org
Null pointer dereference in Virtual Hard Disk (VHD) Miniport Driver allows an unauthorized attacker to deny service locally.
AnalysisAI
Local denial of service in the Windows Virtual Hard Disk (VHD) Miniport Driver enables unprivileged attackers to crash the host operating system across every supported Windows release, from Windows 10 1607 through Windows 11 26H1 and Windows Server 2016 through Server 2025. A malformed VHD operation submitted by a local user with no elevated privileges triggers a null pointer dereference (CWE-476) in the kernel-mode driver, producing an unhandled exception that results in a Blue Screen of Death and complete system outage. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a local session on the affected Windows system - this includes physical console access, a Remote Desktop Protocol session, an SSH-forwarded shell, or any local user-mode process executing under a standard (non-administrator) account. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.1 score is appropriate for a local, availability-only vulnerability; the scope change (S:C) accounts for the fact that a kernel crash terminates the entire Windows host rather than just the VHD subsystem. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the Microsoft security update for CVE-2026-69384 through Windows Update, WSUS, or Microsoft Update Catalog; the MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69384 specifies the exact fixed build for each platform (e.g., Windows Server 2025 must reach build 10.0.26100.33438, Windows 10 22H2 must reach 10.0.19045.7725, Windows 11 23H2 must reach 10.0.22631.7582). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify systems performing VHD operations (Hyper-V hosts, backup software, VM management servers) and document their current Windows editions and build numbers. …
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Same weakness CWE-476 – NULL Pointer Dereference
View allSame technique Denial Of Service
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External POC / Exploit Code
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