High severity7.8NVD Advisory· Published Jul 14, 2026· Updated Jul 22, 2026

CVE-2026-56644

Description

Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.

Microsoft/Windows 10 16073 versions
cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:*:*range: <10.0.14393.9339
- cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:*:*range: <10.0.19044.7548
- cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:*:*range: <10.0.19045.7548
Microsoft/Windows 10 1809
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:*:*
Range: <10.0.17763.9020
Microsoft/Windows 11 24h2
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:*:*
Range: <10.0.26100.8875
Microsoft/Windows 11 25h2
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:*:*
Range: <10.0.26200.8875
Microsoft/Windows 11 26h1
cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:*:*
Range: <10.0.28000.2525
Microsoft/Windows Server 2016
cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*
Range: <10.0.14393.9339
Microsoft/Windows Server 2019
cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*
Range: <10.0.17763.9020
Microsoft/Windows Server 2003
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*
Range: <10.0.20348.5386
Microsoft/Windows Server 2025
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*
Range: <10.0.26100.33158
Microsoft/Windows Kernelllm-fuzzy

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