Windows Kernel Elevation of Privilege Vulnerability

According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?
Successful exploitation of this vulnerability requires an attacker to take additional actions prior to exploitation to prepare the target environment.

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

Security updates
10.0.26100.2033 — https://support.microsoft.com/help/5044284
10.0.17763.6414 — https://support.microsoft.com/help/5044277
10.0.20348.2762 — https://support.microsoft.com/help/5044281
10.0.22000.3260 — https://support.microsoft.com/help/5044280
10.0.19044.5011 — https://support.microsoft.com/help/5044273
10.0.22621.4317 — https://support.microsoft.com/help/5044285
10.0.25398.1189 — https://support.microsoft.com/help/5044288
10.0.10240.20796 — https://support.microsoft.com/help/5044286
10.0.14393.7428 — https://support.microsoft.com/help/5044293
6.0.6003.22918 — https://support.microsoft.com/help/5044320
6.0.6003.22918 — https://support.microsoft.com/help/5044306
6.1.7601.27366 — https://support.microsoft.com/help/5044356
6.1.7601.27366 — https://support.microsoft.com/help/5044321
6.2.9200.25118 — https://support.microsoft.com/help/5044342
6.3.9600.22221 — https://support.microsoft.com/help/5044343