Denial of service in Microsoft Windows Hyper-V

1) Input validation error

EUVDB-ID: #VU109094

Risk: Low

CVSSv4.0: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-29955

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a local attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input in Windows Hyper-V. A local attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Windows Server: 2012 Gold - 2025 10.0.26100.3775

Windows: 10 1607 10.0.14393.10 - 11 24H2 10.0.26100.3775

CPE2.3

• cpe:2.3:o:microsoft:windows_server:2012_Gold:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server:2012_R2:6.3.9600.21871:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server:2012_R2:6.3.9600.21924:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server:2012_R2:6.3.9600.21972:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server:2012_R2:6.3.9600.22023:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server:2012_R2:6.3.9600.22074:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server:2012_R2:6.3.9600.22134:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server:2012_R2:6.3.9600.22175:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server:2012_R2:6.3.9600.22221:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server:2012_R2:6.3.9600.22267:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows:10_1607:10.0.14393.10:*:*:*:*:*:*

External links

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-29955

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.