High severity7.8NVD Advisory· Published May 12, 2026· Updated Jun 1, 2026

CVE-2026-40369

Description

Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.

Microsoft/Windows 11 24h22 versions
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:*+ 1 more
- cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:*range: <10.0.26100.8390
- cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:x64:*range: <10.0.26100.8390
Microsoft/Windows 11 25h22 versions
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:*+ 1 more
- cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:*range: <10.0.26200.8390
- cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:x64:*range: <10.0.26200.8390
Microsoft/Windows 11 26h12 versions
cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:arm64:*+ 1 more
- cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:arm64:*range: <10.0.28000.2113
- cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:x64:*range: <10.0.28000.2113
Microsoft/Windows Server 2025
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*
Range: <10.0.26100.32772
Microsoft/Windows Kernelllm-fuzzy