CVE-2026-42980
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Integer Underflow in Windows NT OS Kernel Leads to Privilege Escalation

Publication date: 2026-06-09

Last updated on: 2026-06-09

Assigner: Microsoft Corporation

Description
Integer underflow (wrap or wraparound) in Windows NT OS Kernel allows an authorized attacker to elevate privileges locally.
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Meta Information
Published
2026-06-09
Last Modified
2026-06-09
Generated
2026-06-10
AI Q&A
2026-06-09
EPSS Evaluated
N/A
NVD
CVE-2026-42980
EUVD
EUVD-2026-35598
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
microsoft windows_nt_os_kernel *
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-122 A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
CWE-191 The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.
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Executive Summary

This vulnerability is an integer underflow (wrap or wraparound) in the Windows NT OS Kernel. It allows an authorized attacker to elevate their privileges locally on the affected system.

Impact Analysis

The impact of this vulnerability is elevation of privilege, meaning an attacker who already has some level of access can gain higher privileges, potentially leading to full control over the affected system.

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