CVE-2026-40369: CWE-822: Untrusted Pointer Dereference in Microsoft Windows 11 Version 24H2
Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability involves a heap-based buffer overflow in the Windows Kernel component of Windows 11 Version 24H2 (build 10.0.26100.0). An authorized attacker with local access can exploit this flaw to elevate their privileges on the affected system. The vulnerability is tracked as CWE-822, indicating an untrusted pointer dereference leading to memory corruption. Microsoft has released an official fix to remediate this issue.
Potential Impact
Successful exploitation of this vulnerability can result in a local privilege escalation, granting the attacker higher system privileges. The CVSS v3.1 base score is 7.8 (High), reflecting the significant confidentiality, integrity, and availability impacts. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. It is strongly recommended to apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40369 to remediate this vulnerability.
CVE-2026-40369: CWE-822: Untrusted Pointer Dereference in Microsoft Windows 11 Version 24H2
Description
Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.
CVSS v3.1
Score 7.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a heap-based buffer overflow in the Windows Kernel component of Windows 11 Version 24H2 (build 10.0.26100.0). An authorized attacker with local access can exploit this flaw to elevate their privileges on the affected system. The vulnerability is tracked as CWE-822, indicating an untrusted pointer dereference leading to memory corruption. Microsoft has released an official fix to remediate this issue.
Potential Impact
Successful exploitation of this vulnerability can result in a local privilege escalation, granting the attacker higher system privileges. The CVSS v3.1 base score is 7.8 (High), reflecting the significant confidentiality, integrity, and availability impacts. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. It is strongly recommended to apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40369 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-04-11T23:06:15.615Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40369","vendor":"Microsoft"}]
Threat ID: 6a036550cbff5d861008c8fe
Added to database: 05/12/2026, 17:37:20 UTC
Last enriched: 06/26/2026, 18:00:54 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 79
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