Integer underflow in Microsoft Windows and Windows Server - CVE-2025-62567

Vulnerability identifier: #VU119474

CSH Severity: Medium

CVSS v4: 6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-62567

CWE-ID: CWE-191

Exploitation vector: Remote access

Exploit availability: No public exploit available

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

The vulnerability exists due to integer underflow in Windows Hyper-V. A remote user can send a specially crafted request to the affected application, trigger integer underflow and cause a denial of service condition on the target system.

Microsoft Windows
Windows Server

Install updates from vendor's website.

Microsoft Windows - addressed in versions 10 21H2 10.0.19044.6691, 10 22H2 10.0.19045.6691, 10 1607 10.0.14393.8688, 10 1809 10.0.17763.8146, 11 23H2 10.0.22631.6345, 11 24H2 10.0.26100.7392, 11 24H2 10.0.26100.7462
Windows Server - addressed in versions 2008 6.0.6003.23666, 2012 R2 6.3.9600.22920, 2016 10.0.14393.8688, 2019 10.0.17763.8146, 2022 23H2 10.0.25398.2025, 2022 10.0.20348.4467, 2022 10.0.20348.4529, 2025 10.0.26100.7392, 2025 10.0.26100.7462

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-62567

• Denial of service in Microsoft Windows Hyper-V