CVE-2026-27922: Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
Other sources
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
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Fixed in 6.3.9600.23132Patch KB5082126 - Upgrade
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Fixed in 6.2.9200.26026Patch KB5082127 - Upgrade
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Fixed in 10.0.14393.9060Patch KB5082198 - Upgrade
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Fixed in 10.0.26100.32690Patch KB5082063 - Upgrade
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Fixed in 10.0.26100.8246Patch KB5083769 - Upgrade
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Fixed in 10.0.22631.6936Patch KB5082052 - Upgrade
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Fixed in 10.0.26200.8246Patch KB5083769 - Upgrade
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Fixed in 10.0.25398.2274Patch KB5082060 - Upgrade
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Fixed in 10.0.19045.7184Patch KB5082200 - Upgrade
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Fixed in 10.0.19044.7184Patch KB5082200 - Upgrade
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Fixed in 10.0.20348.5020Patch KB5082142 - Upgrade
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Fixed in 10.0.17763.8644Patch KB5082123 - Upgrade
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Fixed in 10.0.28000.1836Patch KB5083768
Event History
Frequently Asked Questions
What is the severity of CVE-2026-27922?
CVE-2026-27922 has been rated as important by Microsoft due to its potential for privilege escalation.
How do I fix CVE-2026-27922?
To address CVE-2026-27922, apply the relevant security updates from Microsoft for your affected Windows version.
Which Windows versions are affected by CVE-2026-27922?
CVE-2026-27922 affects multiple versions of Windows, including Windows Server 2012, Windows 10, and Windows 11.
Can CVE-2026-27922 be exploited remotely?
No, CVE-2026-27922 requires local access to the system to exploit the vulnerability.
What type of vulnerability is CVE-2026-27922 classified as?
CVE-2026-27922 is classified as a Use after free vulnerability in the Windows Ancillary Function Driver for WinSock.