CVE-2025-21334

Microsoft Windows Hyper-V NT Kernel Integration VSP Use-After-Free Vulnerability

Microsoft — Windows

Added to KEV catalog: 14 January 2025
Federal remediation due date: 4 February 2025
Weakness classification (CWE): CWE-416

CISA Description

Microsoft Windows Hyper-V NT Kernel Integration VSP contains a use-after-free vulnerability that allows a local attacker to gain SYSTEM privileges.

Required action

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Notes

https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-21334 ; https://nvd.nist.gov/vuln/detail/CVE-2025-21334

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