CVE-2026-96848

Analyzed Analyzed - Analysis Complete

Buffer Over-Read in Windows Win32 Kernel Subsystem

Publication date: 2026-10-13

Last updated on: 2026-10-16

Assigner: Microsoft Corporation

Description

Buffer over-read in Windows Win32 Kernel Subsystem allows an authorized attacker to disclose information 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-2026-96848

EUVD

EUVD-2026-99775

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_10_1809	to 10.0.17763.9376 (exc)
microsoft	windows_10_1809	to 10.0.17763.9376 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7807 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7807 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7807 (exc)
microsoft	windows_11_23h2	to 10.0.22631.7652 (exc)
microsoft	windows_11_23h2	to 10.0.22631.7652 (exc)
microsoft	windows_server_2025	to 10.0.26100.33650 (exc)
microsoft	windows_server_2022	to 10.0.20348.5761 (exc)
microsoft	windows_server_2019	to 10.0.17763.9376 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7807 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7807 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7807 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-126	The product reads from a buffer using buffer access mechanisms such as indexes or pointers that reference memory locations after the targeted buffer.

Attack-Flow Graph

Executive Summary

This vulnerability is a buffer over-read in the Windows Win32 Kernel Subsystem. It allows an authorized attacker to read beyond the intended memory buffer, potentially exposing sensitive information stored in memory.

Detection Guidance

This vulnerability is a local information disclosure issue in the Windows Win32 Kernel Subsystem. Detection typically requires analyzing system logs or running specific diagnostic tools provided by Microsoft. Check for unusual kernel memory access patterns or crashes in win32k.sys. Use Microsoft's official update guide and security tools like Windows Defender or System File Checker for potential indicators.

Impact Analysis

An attacker could exploit this to access confidential data on your system, such as passwords or personal files, if they already have local access. This could lead to further attacks or data breaches.

Compliance Impact

This vulnerability allows local information disclosure due to a buffer over-read in the Windows Win32 Kernel Subsystem. Such unauthorized data exposure could potentially violate GDPR's data protection principles if personal data is involved, and may conflict with HIPAA's requirements for safeguarding protected health information.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the Windows Win32 Kernel Subsystem vulnerability. Monitor Microsoft's update guide for patches and install them promptly.

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