CVE-2026-62705 in Windows
Summary
by MITRE • 08/11/2026
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Bind Filter Driver allows an authorized attacker to elevate privileges locally.
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Analysis
by VulDB Data Team • 08/11/2026
A race condition vulnerability exists in the Windows Bind Filter Driver that enables unauthorized privilege escalation through improper synchronization of shared resources during concurrent execution. This flaw resides within the kernel-mode driver component responsible for filtering and managing network bind operations, creating a temporal window where multiple threads or processes can access shared memory structures simultaneously without adequate locking mechanisms. The vulnerability manifests when the driver fails to properly implement mutual exclusion controls during critical sections where shared data structures are modified, allowing concurrent access patterns that can lead to unpredictable behavior and potential privilege escalation.
The technical implementation of this race condition occurs within the driver's handling of network binding operations where multiple threads may attempt to modify shared kernel data structures representing socket bindings or network resource allocations. When these operations occur concurrently without proper synchronization primitives such as spin locks, mutexes, or other inter-thread coordination mechanisms, the system can enter an inconsistent state where memory corruption occurs or access permissions are improperly modified. The attacker must have local authenticated access to exploit this vulnerability, typically requiring a standard user account or lower privilege level that can execute code within the Windows kernel space context.
This race condition creates a significant operational impact by allowing a locally authenticated attacker to escalate their privileges from standard user to SYSTEM level authority. The exploitation process involves carefully timing concurrent operations against the vulnerable driver interface to manipulate shared resources in ways that modify access control lists, privilege structures, or other security-relevant kernel data. The vulnerability affects Windows operating systems where the Bind Filter Driver is installed and actively used, particularly impacting enterprise environments where local user access may be more prevalent. Attackers can leverage this weakness to gain complete system control, potentially leading to data exfiltration, persistence mechanisms installation, or further lateral movement within the network infrastructure.
The underlying cause of this vulnerability aligns with CWE-362, which specifically addresses race conditions in concurrent programming contexts where improper synchronization leads to security flaws. From an adversarial perspective, this vulnerability maps to multiple ATT&CK techniques including privilege escalation through kernel exploits and persistence mechanisms. The attack surface is primarily limited to local execution environments but can be particularly dangerous in multi-user systems or environments where users may have access to system resources that could facilitate exploitation. Mitigation strategies should focus on implementing proper synchronization primitives within the driver code, applying Microsoft security updates promptly, and enforcing least privilege principles to limit potential impact from successful exploitation attempts. Additionally, system administrators should monitor for unusual kernel-mode activity patterns that might indicate attempted exploitation of similar race condition vulnerabilities in other drivers or system components.