CVE-2026-42978
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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
CVE-2026-42978
EUVD
EUVD-2026-35738
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
microsoft windows_push_notifications *
Helpful Resources
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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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 exploit the timing issue to elevate their privileges locally on the affected system.

Impact Analysis

The vulnerability can allow an authorized attacker to elevate their privileges on the local system. This means the attacker could gain higher-level access than intended, potentially leading to unauthorized actions, data access, or system modifications.

Mitigation Strategies

To mitigate this vulnerability, 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 access to authorized users and monitoring for unusual privilege escalation attempts can help reduce risk.

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