Description
Null pointer dereference in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Microsoft | Windows 10 Version 1507 | 10.0.10240.0 – < 10.0.10240.21100 | 10.0.10240.21100 |
| Microsoft | Windows 10 Version 1607 | 10.0.14393.0 – < 10.0.14393.8330 | 10.0.14393.8330 |
| Microsoft | Windows 10 Version 1809 | 10.0.17763.0 – < 10.0.17763.7678 | 10.0.17763.7678 |
| Microsoft | Windows 10 Version 21H2 | 10.0.19044.0 – < 10.0.19044.6216 | 10.0.19044.6216 |
| Microsoft | Windows 10 Version 22H2 | 10.0.19045.0 – < 10.0.19045.6216 | 10.0.19045.6216 |
| Microsoft | Windows 11 version 22H2 | 10.0.22621.0 – < 10.0.22621.5768 | 10.0.22621.5768 |
| Microsoft | Windows 11 version 22H3 | 10.0.22631.0 – < 10.0.22631.5768 | 10.0.22631.5768 |
| Microsoft | Windows 11 Version 23H2 | 10.0.22631.0 – < 10.0.22631.5768 | 10.0.22631.5768 |
| Microsoft | Windows 11 Version 24H2 | 10.0.26100.0 – < 10.0.26100.4946 | 10.0.26100.4946 |
| Microsoft | Windows Server 2008 R2 Service Pack 1 | 6.1.7601.0 – < 6.1.7601.27872 | 6.1.7601.27872 |
| Microsoft | Windows Server 2008 R2 Service Pack 1 (Server Core installation) | 6.1.7601.0 – < 6.1.7601.27872 | 6.1.7601.27872 |
| Microsoft | Windows Server 2008 Service Pack 2 | 6.0.6003.0 – < 6.0.6003.23471 | 6.0.6003.23471 |
| Microsoft | Windows Server 2008 Service Pack 2 (Server Core installation) | 6.0.6003.0 – < 6.0.6003.23471 | 6.0.6003.23471 |
| Microsoft | Windows Server 2012 | 6.2.9200.0 – < 6.2.9200.25622 | 6.2.9200.25622 |
| Microsoft | Windows Server 2012 (Server Core installation) | 6.2.9200.0 – < 6.2.9200.25622 | 6.2.9200.25622 |
| Microsoft | Windows Server 2012 R2 | 6.3.9600.0 – < 6.3.9600.22725 | 6.3.9600.22725 |
| Microsoft | Windows Server 2012 R2 (Server Core installation) | 6.3.9600.0 – < 6.3.9600.22725 | 6.3.9600.22725 |
| Microsoft | Windows Server 2016 | 10.0.14393.0 – < 10.0.14393.8330 | 10.0.14393.8330 |
| Microsoft | Windows Server 2016 (Server Core installation) | 10.0.14393.0 – < 10.0.14393.8330 | 10.0.14393.8330 |
| Microsoft | Windows Server 2019 | 10.0.17763.0 – < 10.0.17763.7678 | 10.0.17763.7678 |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.17763.0 – < 10.0.17763.7678 | 10.0.17763.7678 |
| Microsoft | Windows Server 2022 | 10.0.20348.0 – < 10.0.20348.4052 | 10.0.20348.4052 |
| Microsoft | Windows Server 2022, 23H2 Edition (Server Core installation) | 10.0.25398.0 – < 10.0.25398.1791 | 10.0.25398.1791 |
| Microsoft | Windows Server 2025 | 10.0.26100.0 – < 10.0.26100.4946 | 10.0.26100.4946 |
| Microsoft | Windows Server 2025 (Server Core installation) | 10.0.26100.0 – < 10.0.26100.4946 | 10.0.26100.4946 |
Advisories 3
- WID-SEC-2025-1790 Microsoft Windows und Windows Server: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 20, 2025
- NCSC-2025-0251 Kwetsbaarheden verholpen in Microsoft Windows NCSC-NL (Netherlands) · Aug 13, 2025
- MSRC-CVE-2025-53141 Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability Microsoft Security Response Center · Aug 12, 2025
References
- Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability vendor-advisory patch