What is CVE-2023-21768?

CVE-2023-21768 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability

Which CVE IDs does CVE-2023-21768 cover?

CVE-2023-21768 covers the following CVE IDs: CVE-2023-21768. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2023-21768?

CVE-2023-21768 has a CVSS v3 base score of 7.8, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2023-21768?

CVE-2023-21768 affects 6 products, including: Windows 11 Version 22H2 for ARM64-based Systems; Windows 11 Version 22H2 for x64-based Systems; Windows 11 version 21H2 for ARM64-based Systems; Windows 11 version 21H2 for x64-based Systems; Windows Server 2022; and others — see the full list on the advisory page.

CVE-2023-21768HighCVSS 7.8

Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

January 10, 2023

Last Modified

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🔗 CVE IDs covered (1)

CVE-2023-21768 →

📋 Description

What privileges could be gained by an attacker who successfully exploited this vulnerability? An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.

🎯 Affected products6

Windows 11 Version 22H2 for ARM64-based Systems
Windows 11 Version 22H2 for x64-based Systems
Windows 11 version 21H2 for ARM64-based Systems
Windows 11 version 21H2 for x64-based Systems
Windows Server 2022
Windows Server 2022 (Server Core installation)

✅ Remediation

KB5022291 (Security Update) — fixed build 10.0.20348.1487 KB5022287 (Security Update) — fixed build 10.0.22000.1455 KB5022303 (Security Update) — fixed build 10.0.22621.1105

🔗 References (5)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21768
patchhttps://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5022291
patchhttps://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5022287
patchhttps://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5022303
referencehttps://support.microsoft.com/help/5022303