medium6.5
CVE-2026-56168
Null pointer dereference in Windows SMB Server allows an authorized attacker to deny service over a network.
Impact
Null pointer dereference in Windows SMB Server allows an authorized attacker to deny service over a network.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Microsoft | Windows 10 21h2 | before 10.0.19044.7548 |
| Microsoft | Windows 10 22h2 | before 10.0.19045.7548 |
| Microsoft | Windows 11 24h2 | before 10.0.26100.8875 |
| Microsoft | Windows 11 25h2 | before 10.0.26200.8875 |
| Microsoft | Windows 11 26h1 | before 10.0.28000.2269 before 10.0.28000.2525 |
| Microsoft | Windows Server 2022 | before 10.0.20348.5386 |
| Microsoft | Windows Server 2025 | before 10.0.26100.33158 |
| Microsoft | Windows 10 Version 21H2 | from 10.0.19044.0 before 10.0.19044.7548 |
| Microsoft | Windows 10 Version 22H2 | from 10.0.19045.0 before 10.0.19045.7548 |
| Microsoft | Windows 11 Version 24H2 | from 10.0.26100.0 before 10.0.26100.8875 |
| Microsoft | Windows 11 Version 25H2 | from 10.0.26200.0 before 10.0.26200.8875 |
| Microsoft | Windows 11 Version 26H1 | from 10.0.28000.0 before 10.0.28000.2525 |
| Microsoft | Windows Server 2022 | from 10.0.20348.0 before 10.0.20348.5386 |
| Microsoft | Windows Server 2025 | from 10.0.26100.0 before 10.0.26100.33158 |
| Microsoft | Windows Server 2025 (Server Core Installation) | from 10.0.26100.0 before 10.0.26100.33158 |