7.8
High
CVE-2026-40369 Windows Kernel Elevation of Privilege Vulnerability
Description
Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.
CVSS 3.1 detail
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:CExploitable with local access to the machine, with an ordinary account and without any user action; an attacker can seriously compromise confidentiality, integrity or availability.
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- Interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Windows 11 Version 24H2 10.0 | 10.0.26100.0 → < 10.0.26100.8457 | 10.0.26100.8457 |
| Windows 11 Version 25H2 10.0 | 10.0.26200.0 → < 10.0.26200.8457 | 10.0.26200.8457 |
| Windows 11 version 26H1 10.0 | 10.0.28000.0 → < 10.0.28000.2113 | 10.0.28000.2113 |
| Windows Server 2025 10.0 | 10.0.26100.0 → < 10.0.26100.32860 | 10.0.26100.32860 |
| Windows Server 2025 (Server Core installation) 10.0 | 10.0.26100.0 → < 10.0.26100.32860 | 10.0.26100.32860 |
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