CVE-2022-21989: 
vulnerability analysis and mitigation

Windows Kernel Elevation of Privilege Vulnerability (CVE-2022-21989) was disclosed on February 8, 2022. This vulnerability affects various versions of Microsoft Windows operating systems, including Windows 10, Windows 11, and Windows Server editions (NVD, CVE).

The vulnerability has been assigned a CVSS v3.1 base score of 7.8 (HIGH) with the vector string CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H. Under CVSS v2.0, it received a base score of 6.9 (MEDIUM) with the vector (AV:L/AC:M/Au:N/C:C/I:C/A:C) (NVD).

This vulnerability could allow an attacker to gain elevated privileges in the Windows Kernel, potentially leading to complete system compromise with high impacts on confidentiality, integrity, and availability (NVD).

Microsoft has released security updates to address this vulnerability across multiple Windows versions, including Windows 10 (versions 1507 through 21H2), Windows 11, and various Windows Server editions. Users are advised to apply the appropriate security updates (Rapid7).

The vulnerability was part of Microsoft's February 2022 Patch Tuesday release, which was noted as being relatively light in terms of security updates and notably free of zero-day threats (Krebs).