CVE-2025-29833: 
vulnerability analysis and mitigation

A Time-of-check time-of-use (TOCTOU) race condition vulnerability was discovered in Windows Virtual Machine Bus (VMBus), identified as CVE-2025-29833. The vulnerability was disclosed on May 13, 2025, as part of Microsoft's May 2025 Patch Tuesday updates. This security flaw affects multiple versions of Windows operating systems, including Windows Server 2012, Windows 10, Windows 11, and Windows Server editions up to 2025 (NVD, Wiz).

The vulnerability is classified as a Critical severity issue with a CVSS v3.1 Base Score of 7.7 (HIGH). The CVSS vector string is CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H, indicating local attack vector, high attack complexity, no privileges required, and user interaction required. The vulnerability is identified as CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition (NVD).

If successfully exploited, this vulnerability allows an unauthorized attacker to execute code locally, potentially compromising the integrity and security of the affected system. The vulnerability affects the Windows Virtual Machine Bus component, which is critical for virtual machine operations (NVD, Wiz).

Microsoft has released security updates to address this vulnerability as part of their May 2025 Patch Tuesday. Users and administrators are strongly advised to apply the security updates immediately through Windows Update or enterprise management tools (Wiz).