CVE-2026-50329

Analyzed Analyzed - Analysis Complete

Use After Free in Windows Kernel Allows Privilege Escalation

Publication date: 2026-07-14

Last updated on: 2026-07-22

Assigner: Microsoft Corporation

Description

Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-07-14

Last Modified

2026-07-22

Generated

2026-08-04

AI Q&A

2026-07-15

EPSS Evaluated

2026-08-02

NVD

CVE-2026-50329

EUVD

EUVD-2026-43852

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_11_26h1	to 10.0.28000.2269 (exc)
microsoft	windows_10_1809	to 10.0.17763.9020 (exc)
microsoft	windows_10_1809	to 10.0.17763.9020 (exc)
microsoft	windows_server_2019	to 10.0.17763.9020 (exc)
microsoft	windows_server_2022	to 10.0.20348.5386 (exc)
microsoft	windows_server_2025	to 10.0.26100.33158 (exc)
microsoft	windows_11_26h1	to 10.0.28000.2525 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7548 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7548 (exc)
microsoft	windows_11_24h2	to 10.0.26100.8875 (exc)
microsoft	windows_11_25h2	to 10.0.26200.8875 (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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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. An authorized attacker can exploit this to elevate their privileges locally on an affected system.

Detection Guidance

This vulnerability involves a use-after-free issue in the Windows Kernel that allows local privilege escalation. Detection typically requires analyzing system logs for kernel crashes or unusual privilege changes. Microsoft's official update guide should be checked for patches or detection guidance.

Impact Analysis

An attacker with local access could gain higher privileges, potentially allowing them to install programs, view or delete data, or create new accounts with full user rights.

Compliance Impact

This vulnerability could lead to unauthorized access or privilege escalation, potentially violating data protection requirements under GDPR or HIPAA if sensitive data is compromised.

Mitigation Strategies

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

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