CVE-2026-42979
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Windows Push Notifications Race Condition Privilege Escalation

Publication date: 2026-06-09

Last updated on: 2026-06-09

Assigner: Microsoft Corporation

Description
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Push Notifications 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
EUVD
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
microsoft windows_push_notifications *
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-362 The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.
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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
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Executive Summary

This vulnerability is a race condition in Windows Push Notifications where concurrent execution uses a shared resource without proper synchronization. This flaw allows an authorized attacker to elevate their privileges locally on the affected system.

Impact Analysis

An attacker who is already authorized on the system can exploit this vulnerability to gain higher privileges than intended. This elevation of privilege can lead to full control over the system, allowing the attacker to execute actions with elevated rights, potentially compromising system integrity, confidentiality, and availability.

Mitigation Strategies

To mitigate this vulnerability, it is important to apply the security updates provided by Microsoft for Windows Push Notifications as soon as they become available.

Since the vulnerability involves a race condition allowing local privilege escalation, limiting local user access and ensuring that only authorized users have access to the affected system can help reduce risk until patches are applied.

Compliance Impact

The vulnerability allows an authorized attacker to elevate privileges locally through a race condition in Windows Push Notifications.

Elevation of privilege vulnerabilities can potentially lead to unauthorized access or modification of sensitive data, which may impact compliance with standards such as GDPR and HIPAA that require strict access controls and protection of personal or health information.

However, the provided information does not specify direct effects or compliance implications related to these regulations.

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