CVE-2026-40369

published 2026-05-12

CVE-2026-40369: Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.

high 7.8 CVSS 3.1

AV L AC L PR L UI N S U C H I H A H

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

Affected

8 ranges

Vendor	Product	Version range	Fixed in
microsoft	windows_11_24h2	< 10.0.26100.8390	10.0.26100.8390
microsoft	windows_11_25h2	< 10.0.26200.8390	10.0.26200.8390
microsoft	windows_11_26h1	< 10.0.28000.2113	10.0.28000.2113
microsoft	windows_11_version_24h2	>= 10.0.26100.0 < 10.0.26100.8457	10.0.26100.8457
microsoft	windows_11_version_25h2	>= 10.0.26200.0 < 10.0.26200.8457	10.0.26200.8457
microsoft	windows_11_version_26h1	>= 10.0.28000.0 < 10.0.28000.2113	10.0.28000.2113
microsoft	windows_server_2025	< 10.0.26100.32772	10.0.26100.32772
microsoft	windows_server_2025	>= 10.0.26100.0 < 10.0.26100.32860	10.0.26100.32860

CWE-822