CVE-2026-40369
Windows Kernel Elevation of Privilege Vulnerability
Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Windows Kernel Elevation of Privilege Vulnerability
Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.
- Record
CVE-2026-40369- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Weakness
- CWE-822
- Updated
- 2026-11-03
EUVDEUVD-2026-29651
Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.
- Record
EUVD-2026-29651- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-4qhv-qjg6-r699
Untrusted pointer dereference in Windows Kernel allows an authorized attacker to elevate...
Untrusted pointer dereference in Windows Kernel allows an authorized attacker to elevate privileges locally.
- Record
GHSA-4qhv-qjg6-r699- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-822
- Updated
- 2026-11-02
NVD
Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.
- Record
CVE-2026-40369- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-822
- Updated
- 2026-11-04
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | orinimron123/CVE-2026-40369-EXPLOIT | 2026-05-13 |
| PoC in GitHub | ercihan/CVE-2026-40369 | 2026-05-21 |
| PoC in GitHub | piffd0s/ntoskrnl-metadata | 2026-05-22 |
| PoC in GitHub | ashrafzaryouh/CVE-2026-40369 | 2026-06-18 |
| PoC in GitHub | CCELEND/CVE-2026-40369 | 2026-06-23 |
| PoC in GitHub | dbgbgtf1/cve-2026-40369-exploit | 2026-09-08 |
History
| Recorded | Changed | Sources |
|---|---|---|
| exploits | PoC in GitHub | |
| exploits | NVD, PoC in GitHub | |
| exploits, facts | CVE List, EUVD | |
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-40369 is a high vulnerability (CVSS 7.8) in Microsoft Windows 11 Version 24h2, published May 12, 2026. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 4.72%, the 91st percentile. No source names a fixed version.