CVE-2026-50310
Summary
by MITRE • 07/14/2026
Integer overflow or wraparound in Windows Devices Human Interface allows an authorized attacker to disclose information locally.
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Analysis
by VulDB Data Team • 07/14/2026
This vulnerability represents a critical integer overflow condition within the Windows Devices Human Interface subsystem that can be exploited by authorized local attackers to achieve unauthorized information disclosure. The flaw occurs when the system processes device input handling routines where integer variables exceed their maximum representable values, causing them to wrap around to minimum values or zero, creating predictable patterns that can be leveraged for data exposure. The vulnerability is classified under CWE-190 as an integer overflow in the context of human interface devices, specifically affecting Windows operating systems' device driver interfaces and input processing mechanisms.
The technical implementation involves the manipulation of unsigned integer variables during device interaction protocols where buffer sizes or counter values are not properly validated against their maximum limits. When an attacker with local access crafts specific device inputs or manipulates existing device states, they can trigger arithmetic operations that cause these integers to wrap around, potentially leading to memory corruption or predictable offset calculations that expose sensitive data structures or kernel memory regions. The attack vector requires local system access and leverages the Windows Device Driver Model's handling of human interface device communications, making it particularly concerning for systems where physical access is possible or where users with legitimate access could be compromised.
The operational impact extends beyond simple information disclosure to potentially enable more sophisticated attacks including privilege escalation or system compromise. While the initial vector requires authorized local access, the vulnerability creates a potential pathway for attackers to gather intelligence about system memory layouts, kernel structures, or sensitive data stored in device driver contexts. This information can then be used to refine subsequent attacks or provide insights into system internals that would otherwise remain hidden from normal operation. The vulnerability affects Windows systems where human interface devices are processed, including keyboards, mice, touchscreens, and other input peripherals that interact through the Windows Device Interface subsystem.
Mitigation strategies should focus on implementing proper integer bounds checking within device driver code and ensuring that all arithmetic operations involving device data are validated against maximum representable values. Microsoft has released security updates addressing this vulnerability through patches that enhance input validation in the human interface device handling components, requiring system administrators to deploy these updates promptly. Organizations should also implement monitoring for unusual device interaction patterns that might indicate exploitation attempts, while maintaining strict access controls and privilege separation to limit the potential impact of local exploitation. The ATT&CK framework categorizes this vulnerability under privilege escalation techniques due to its potential for enabling further attack progression from local information disclosure to system compromise, emphasizing the importance of layered security approaches that prevent attackers from leveraging such vulnerabilities effectively.