CVE-2026-42979

Analyzed Analyzed - Analysis Complete

Windows Push Notifications Race Condition Privilege Escalation

Publication date: 2026-06-09

Last updated on: 2026-06-11

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.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-06-09

Last Modified

2026-06-11

Generated

2026-06-30

AI Q&A

2026-06-09

EPSS Evaluated

2026-06-28

NVD

CVE-2026-42979

EUVD

EUVD-2026-35740

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_10_1809	to 10.0.17763.8880 (exc)
microsoft	windows_10_1809	to 10.0.17763.8880 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7417 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7417 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7417 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7417 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7417 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7417 (exc)
microsoft	windows_11_23h2	to 10.0.22631.7219 (exc)
microsoft	windows_11_23h2	to 10.0.22631.7219 (exc)
microsoft	windows_11_24h2	to 10.0.26100.8655 (exc)
microsoft	windows_11_24h2	to 10.0.26100.8655 (exc)
microsoft	windows_11_25h2	to 10.0.26200.8655 (exc)
microsoft	windows_11_25h2	to 10.0.26200.8655 (exc)
microsoft	windows_11_26h1	to 10.0.28000.2269 (exc)
microsoft	windows_11_26h1	to 10.0.28000.2269 (exc)
microsoft	windows_server_2019	to 10.0.17763.8880 (exc)
microsoft	windows_server_2022	to 10.0.20348.5256 (exc)
microsoft	windows_server_2025	to 10.0.26100.32995 (exc)

Helpful Resources

Exploitability

CWE

KEV

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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Attack-Flow Graph

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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