CVE-2025-55328: 
vulnerability analysis and mitigation

A race condition vulnerability (CVE-2025-55328) was discovered in Windows Hyper-V that allows an authorized attacker to elevate privileges locally. The vulnerability was disclosed on October 14, 2025, and affects multiple versions of Windows operating systems including Windows 10, Windows 11, and Windows Server editions (NVD Database).

The vulnerability is classified as a Concurrent Execution using Shared Resource with Improper Synchronization (race condition) issue, identified as CWE-362. It received a CVSS v3.1 base score of 7.0 (HIGH) from NIST NVD with vector string CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H, while Microsoft assessed it at 7.8 (HIGH) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H (NVD Database).

The vulnerability affects multiple Windows versions including Windows 10 (versions 1507 through 22H2), Windows 11 (versions 22H2 through 25H2), and Windows Server versions (2016 through 2025). If exploited, it allows an authorized attacker to elevate their privileges locally on the affected system (NVD Database).

Microsoft has released security updates to address this vulnerability. Users should update to the latest versions of their respective Windows operating systems. The specific update versions vary by Windows version, with each requiring its own specific patch version (NVD Database).