CVE-2026-83918

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Integer Overflow in Windows Kernel Leads to Privilege Escalation

Publication date: 2026-10-13

Last updated on: 2026-10-16

Assigner: Microsoft Corporation

Description

Integer overflow or wraparound in Windows Kernel allows an authorized attacker to elevate privileges locally.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-10-13

Last Modified

2026-10-16

Generated

2026-10-19

AI Q&A

2026-10-14

EPSS Evaluated

2026-10-18

NVD

CVE-2026-83918

EUVD

EUVD-2026-100054

Affected Vendors & Products

Vendor	Product	Version / Range
Microsoft	Windows	10 Version 1607 10.0.14393.0
Microsoft	Windows	10 Version 1809 10.0.17763.0
Microsoft	Windows	10 Version 21H2 10.0.19044.0
Microsoft	Windows	10 Version 22H2 10.0.19045.0
Microsoft	Windows	11 version 23H2 10.0.22631.0
Microsoft	Windows	11 Version 23H2 10.0.22631.0
Microsoft	Windows	11 Version 24H2 10.0.26100.0
Microsoft	Windows	11 Version 25H2 10.0.26200.0
Microsoft	Windows	11 version 26H1 10.0.28000.0
Microsoft	Windows	11 Version 26H2 10.0.26300.0
Microsoft	Windows	Server 2012 6.2.9200.0
Microsoft	Windows	Server 2012 (Server Core installation) 6.2.9200.0
Microsoft	Windows	Server 2012 R2 6.3.9600.0
Microsoft	Windows	Server 2012 R2 (Server Core installation) 6.3.9600.0
Microsoft	Windows	Server 2016 10.0.14393.0
Microsoft	Windows	Server 2016 (Server Core installation) 10.0.14393.0
Microsoft	Windows	Server 2019 10.0.17763.0
Microsoft	Windows	Server 2019 (Server Core installation) 10.0.17763.0
Microsoft	Windows	Server 2022 10.0.20348.0
Microsoft	Windows	Server 2025 10.0.26100.0
Microsoft	Windows	Server 2025 (Server Core installation) 10.0.26100.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-190	The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

Attack-Flow Graph

Executive Summary

This is an integer overflow or wraparound vulnerability in the Windows Kernel. An authorized attacker with local access could exploit it to elevate their privileges on an affected system.

Detection Guidance

Detection typically requires monitoring for unusual privilege escalation events or kernel-level anomalies. Use Windows Event Viewer to check for Event ID 4672 (Special Privileges Assigned) or Event ID 4688 (New Process Created) with suspicious privilege flags. Run 'wevtutil qe Security /q:*[System[(EventID=4672)]]' to filter privilege assignments. Check for unexpected kernel driver loads with 'driverquery /v' and verify system integrity with 'sfc /scannow'.

Impact Analysis

An attacker could gain higher-level permissions on your system, allowing them to install programs, view or delete data, or create new accounts with full user rights.

Compliance Impact

This vulnerability allows local privilege escalation in Windows systems, which could enable unauthorized access to sensitive data or system functions. This may violate compliance requirements under GDPR (data protection) and HIPAA (health data security) by exposing protected information or system integrity.

Mitigation Strategies

Apply the latest Windows security updates from Microsoft Update to patch the Windows Kernel integer overflow vulnerability. Monitor Microsoft's security advisories for patches and install them promptly.

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