CVE-2026-50322 in Windows
Summary
by MITRE • 07/14/2026
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Runtime allows an authorized attacker to elevate privileges locally.
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Analysis
by VulDB Data Team • 07/14/2026
This vulnerability represents a classic race condition flaw within the Windows Runtime environment that enables local privilege escalation through improper synchronization of concurrent operations. The underlying issue occurs when multiple threads or processes attempt to access shared resources simultaneously without adequate protective mechanisms, creating windows where malicious code can exploit temporal gaps in resource management.
The technical implementation involves the Windows Runtime's handling of shared system resources where concurrent execution paths fail to properly coordinate access through mutexes, semaphores, or other synchronization primitives. When legitimate processes and potentially malicious code both attempt to manipulate the same resource concurrently, the timing of these operations can create exploitable conditions. This flaw specifically affects the Windows Runtime subsystem which governs application execution and system interactions across various Windows versions.
From an operational perspective, this vulnerability requires an attacker to already possess valid user credentials since it operates within the local privilege boundary rather than providing arbitrary code execution. The race condition manifests when the runtime fails to properly validate resource states during concurrent access scenarios, allowing unauthorized modification of privileged resources that should only be accessible through proper authorization channels.
The impact extends beyond simple privilege escalation as it can enable attackers to modify system-critical components, manipulate security policies, or gain access to restricted data repositories. This type of vulnerability aligns with CWE-362 which specifically addresses race conditions in concurrent programming environments and relates to ATT&CK technique T1068 which covers local privilege escalation through system-level vulnerabilities.
Mitigation strategies should focus on implementing proper synchronization mechanisms throughout the Windows Runtime environment, including enhanced mutex usage, atomic operation implementations, and thorough code reviews to identify potential concurrent access patterns. System administrators should ensure timely patch deployment for affected Windows versions, monitor for unusual concurrent process behaviors, and implement least privilege principles to limit the potential impact of successful exploitation attempts. The vulnerability demonstrates the critical importance of proper concurrency control in system-level software components where resource contention can directly translate into security compromise opportunities.