This vulnerability, identified as CWE-416 (Use After Free), exists in the Windows Kernel of Windows 10 Version 21H2 (build 10.0.19044.0). It allows an unauthorized local attacker to elevate privileges by exploiting a use-after-free condition. The CVSS v3.1 score is 7.0, indicating high severity, with attack vector local, high attack complexity, no privileges required, and user interaction required. Microsoft has released an official fix for this vulnerability as documented in their security update guide.

Successful exploitation of this vulnerability could allow a local attacker to elevate their privileges on the affected system, potentially gaining higher-level access than intended. This could lead to full system compromise depending on the privileges escalated to. There are no known exploits in the wild at the time of publication.

An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft for Windows 10 Version 21H2 (build 10.0.19044.0) as soon as possible to remediate this vulnerability. Refer to the Microsoft security update guide for detailed patch information.