CVE-2026-20920
High
Description
Use after free in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Microsoft Windows
PublishedJan 13, 2026
First seenJan 13, 2026
Weakness typeCWE-416Use after free
How to fix
Update
- microsoft windows_11_23h210.0.22631.6491 or later
- microsoft windows_server_202210.0.20348.4648 or later
- microsoft windows_server_2022_23h210.0.25398.2092 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft windows_11_23h2 | v < 10.0.22631.6491 | 10.0.22631.6491 |
| microsoft windows_server_2022 | v < 10.0.20348.4648 | 10.0.20348.4648 |
| microsoft windows_server_2022_23h2 | v < 10.0.25398.2092 | 10.0.25398.2092 |
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