CVE-2026-58527 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 • 07/15/2026
This vulnerability represents a classic race condition flaw within the Windows Runtime environment that enables privilege escalation through improper synchronization of shared resources. The underlying issue occurs when multiple threads or processes attempt to access and modify the same resource simultaneously without adequate locking mechanisms or atomic operations. In the context of Windows Runtime, this weakness manifests when authorized users can manipulate concurrent execution paths that should be protected by proper synchronization primitives, creating opportunities for malicious code to interfere with legitimate system operations and gain elevated privileges.
The technical implementation of this race condition involves shared memory segments or objects within the Windows Runtime framework where access controls are not properly enforced during concurrent operations. When multiple execution contexts attempt to modify the same resource, the timing of these operations can create windows where an attacker-controlled process can insert malicious data or code into the shared resource before legitimate operations complete. This flaw typically occurs in scenarios involving dynamic loading of components, registry modifications, or file system operations that require atomicity but are implemented without proper mutexes, semaphores, or other synchronization mechanisms. The vulnerability is particularly dangerous because it leverages existing authorized access patterns rather than requiring initial compromise through external attack vectors.
The operational impact of this privilege escalation vulnerability extends beyond simple local elevation of privileges to potentially enable attackers to gain SYSTEM-level access within the Windows environment. Once an attacker successfully exploits this race condition, they can manipulate critical system components, modify security policies, install malicious software, or establish persistence mechanisms that would otherwise be restricted to privileged users. This vulnerability affects the integrity and confidentiality of the entire Windows Runtime ecosystem, as it allows unauthorized modifications to system resources that should remain protected by proper access controls. The attack surface includes scenarios where legitimate applications or system processes perform operations on shared resources while an attacker simultaneously attempts to manipulate those same resources through concurrent execution paths.
Mitigation strategies for this race condition vulnerability must address both the immediate synchronization flaws and broader architectural weaknesses within the Windows Runtime environment. Organizations should implement comprehensive code reviews focusing on concurrent access patterns and ensure all shared resource operations utilize proper locking mechanisms such as critical sections, mutexes, or atomic operations as defined in the common weakness enumeration framework. The remediation process requires careful analysis of all resource access patterns within Windows Runtime components to identify and fix synchronization gaps that could enable race condition exploitation. Additionally, implementing runtime protections through technologies like control flow integrity, address space layout randomization, and application whitelisting can provide additional defense layers against potential exploitation attempts. Security hardening measures should also include monitoring for unusual concurrent access patterns and implementing proper privilege separation between different execution contexts to minimize the impact of any remaining synchronization vulnerabilities.
This vulnerability aligns with several ATT&CK techniques including privilege escalation through race conditions and manipulation of system resources, while also relating to CWE-362 which specifically addresses race conditions in shared resource access. The attack vector typically follows established patterns where authorized users leverage legitimate system functionality to create timing windows for exploitation, making detection particularly challenging as the behavior appears normal from a user perspective until privilege escalation occurs.