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

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. Jan 14, 2025 · Catalog

   Detected

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

2. Jan 14, 2025 · CISA KEV

   Known exploited

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

3. Feb 4, 2025 · CISA KEV

   Remediation due

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

4. Sep 24, 2026 · Catalog

   Updated

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

Affected

• cpe microsoft/windows 10 21h2version unspecified
• cpe microsoft/windows 10 22h2version unspecified
• cpe microsoft/windows 11 22h2version unspecified
• cpe microsoft/windows 11 23h2version unspecified
• cpe microsoft/windows 11 24h2version unspecified
• vendor Microsoft Windowsversion unspecified

Sources

• CISA KEVConfirmed exploitationCVE-2025-21335

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

  cisa.gov
• CVE.orgVulnerability recordCVE-2025-21335

  Official CVE identifier

  cve.org
• FIRST EPSSExploitation probabilityCVE-2025-21335

  30-day exploitation probability 1.4%

  first.org
• NIST NVDVulnerability recordCVE-2025-21335

  Windows Hyper-V NT Kernel Integration VSP Elevation of Privilege Vulnerability

  nvd.nist.gov

References

• CISA note · msrc.microsoft.com
• Patch · msrc.microsoft.com
• CISA note · nvd.nist.gov
• US Government Resource · cisa.gov