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 an untrusted pointer dereference leading to a heap-based buffer overflow in the Windows Kernel on Windows 11 Version 24H2 (build 10.0.26100.0). It enables a local attacker with some level of authorization to escalate privileges on the affected system. The vulnerability is tracked as CWE-822. Microsoft has published an official fix to remediate this issue.
Potential Impact
Successful exploitation allows an authorized local attacker to elevate their privileges, potentially gaining higher system rights. This could lead to full system compromise depending on the privileges escalated. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft as soon as possible. Refer to the Microsoft security advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40369 for the patch and detailed remediation instructions.
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
Microsoft
Windows 11 Version 24H2
Microsoft
Windows 11 Version 25H2
Microsoft
Windows 11 version 26H1
Microsoft
Windows Server 2025
Microsoft
Windows Server 2025 (Server Core installation)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an untrusted pointer dereference leading to a heap-based buffer overflow in the Windows Kernel on Windows 11 Version 24H2 (build 10.0.26100.0). It enables a local attacker with some level of authorization to escalate privileges on the affected system. The vulnerability is tracked as CWE-822. Microsoft has published an official fix to remediate this issue.
Potential Impact
Successful exploitation allows an authorized local attacker to elevate their privileges, potentially gaining higher system rights. This could lead to full system compromise depending on the privileges escalated. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft as soon as possible. Refer to the Microsoft security advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40369 for the patch and detailed remediation instructions.
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: 08/11/2026, 16:45:02 UTC
Last updated: 09/12/2026, 10:01:31 UTC
Views: 104
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