CVE-2025-21334 — Microsoft Windows Hyper-V NT Kernel Integration VSP Use-After-Free Vulnerability
CVE-2025-21334: Microsoft Windows Hyper-V NT Kernel Integration VSP Use-After-Free Vulnerability
CISA Known Exploited Vulnerability (KEV)
| Vendor / project | Microsoft |
| Product | Windows |
| Date added | 2025-01-14 |
| Due date | 2025-02-04 |
| Ransomware campaign use | Unknown |
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 (CISA)
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
References
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-21334
- KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog