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CVE-2026-83879 is a race condition vulnerability in the Windows Overlay Filter component of Microsoft Windows 10 Version 1607 and later versions. This flaw allows an authorized local attacker to elevate privileges due to improper synchronization when accessing shared resources concurrently. The vulnerability has a high severity rating and is addressed by an official fix from Microsoft.

CVE-2026-83879 describes a race condition (CWE-362) in the Windows Overlay Filter of Microsoft Windows 10 Version 1607 and subsequent versions. The vulnerability arises from improper synchronization during concurrent execution using shared resources, which can be exploited by an authorized local attacker to elevate privileges. The CVSS v3.1 base score is 7.0, indicating high severity, with attack vector local, high attack complexity, low privileges required, no user interaction, and impacts to confidentiality, integrity, and availability. Microsoft has published an official fix for this vulnerability.

CVE-2026-83879 is a race condition vulnerability in the Windows Overlay Filter component of Microsoft Windows 10 Version 1607 and later versions. This flaw allows an authorized local attacker to elevate privileges due to improper synchronization when accessing shared resources concurrently. The vuln

CVE-2026-83879: CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in Microsoft Windows 10 Version 1607

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