Summary
Impact: Remote Code Execution. Microsoft rating: Important. Not known to be exploited — Exploitation Unlikely. Customer action: Required.
Details
According to the CVSS metric, the attack vector is network (AV:N), user interaction is required (UI:R), and privileges required are low (PR:L). What does that mean for this vulnerability?
Exploitation of this vulnerability requires an authorized attacker on the domain to wait for a user to initiate a connection to a malicious server that the attacker has set up prior to the user connecting.
How could an attacker exploit the vulnerability?
An attacker could exploit this vulnerability by sending a specially crafted NVMe over Fabrics (NVMe‑oF) response message during the connection handshake process that contains an invalid header length value.
Security updates
10.0.26100.32860 — https://support.microsoft.com/help/5087539
10.0.26100.32772 — https://support.microsoft.com/help/5087423
Vulnerabilities 1
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High 8.0
Windows Kernel-Mode Driver Remote Code Execution Vulnerability
Use after free in Windows Kernel-Mode Drivers allows an authorized attacker to execute code over a network.
Revision history
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#1
Information published.
References
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CVE-2026-34332 Windows Kernel-Mode Driver Remote Code Execution Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34332
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Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
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Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
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Common Vulnerability Scoring System
https://www.first.org/cvss