CVE-2026-70077

Analyzed Analyzed - Analysis Complete

Use After Free in Windows Kernel Allows Local Information Disclosure

Publication date: 2026-10-13

Last updated on: 2026-10-28

Assigner: Microsoft Corporation

Description

Use after free in Windows Kernel allows an authorized attacker to disclose information locally.

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Meta Information

Published

2026-10-13

Last Modified

2026-10-28

Generated

2026-11-08

AI Q&A

2026-10-14

EPSS Evaluated

2026-11-07

NVD

CVE-2026-70077

EUVD

EUVD-2026-99149

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_server_2012	r2
microsoft	windows_server_2012	*
microsoft	windows_10_1607	to 10.0.14393.9612 (exc)
microsoft	windows_10_1607	to 10.0.14393.9612 (exc)
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_11_24h2	to 10.0.26100.9711 (exc)
microsoft	windows_11_24h2	to 10.0.26100.9711 (exc)
microsoft	windows_11_25h2	to 10.0.26200.9711 (exc)
microsoft	windows_11_25h2	to 10.0.26200.9711 (exc)
microsoft	windows_11_26h1	to 10.0.28000.3231 (exc)
microsoft	windows_11_26h1	to 10.0.28000.3231 (exc)
microsoft	windows_11_26h2	to 10.0.26300.9711 (exc)
microsoft	windows_11_26h2	to 10.0.26300.9711 (exc)
microsoft	windows_server_2016	to 10.0.14393.9612 (exc)
microsoft	windows_server_2019	to 10.0.17763.9376 (exc)
microsoft	windows_server_2025	to 10.0.26100.33650 (exc)
microsoft	windows_server_2022	to 10.0.20348.5761 (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-416	The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Attack-Flow Graph

Executive Summary

This is a use-after-free vulnerability in the Windows Kernel. It allows an authorized attacker with local access to exploit freed memory to disclose sensitive information. The vulnerability exists in multiple versions of Windows and Windows Server.

Detection Guidance

This vulnerability is a use-after-free issue in the Windows Kernel that allows local information disclosure. Detection typically requires analyzing system memory or kernel behavior for signs of use-after-free conditions. Use tools like Windows Event Viewer to check for kernel-related errors or crashes. Microsoft's own tools such as Windows Defender or System File Checker (sfc /scannow) may help identify system file corruption that could indicate exploitation. No specific public commands are provided in the available resources.

Impact Analysis

An attacker with local access could exploit this to read sensitive data from memory, potentially including passwords, encryption keys, or other confidential information. This could lead to further system compromise or data breaches.

Compliance Impact

This vulnerability allows local information disclosure due to a use-after-free flaw in the Windows Kernel. Such flaws can potentially expose sensitive data, which may impact compliance with regulations like GDPR (data protection) and HIPAA (health information privacy) by increasing the risk of unauthorized data access.

Mitigation Strategies

Apply the latest Windows security updates from Microsoft to patch the Windows Kernel use-after-free vulnerability. Monitor Microsoft's security advisories for updates and ensure all affected systems are updated promptly.

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