CVE-2026-72962 in Windows
Summary
by MITRE • 09/09/2026
Heap-based buffer overflow in Windows USB Video Driver allows an authorized attacker to elevate privileges locally.
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Analysis
by VulDB Data Team • 09/09/2026
The vulnerability identified involves a heap-based buffer overflow within the Windows USB Video Device driver, commonly known as usbvideo.sys. This component is responsible for managing communication between the operating system and various video capture devices connected via Universal Serial Bus interfaces, such as webcams, digital cameras, and other multimedia peripherals. The core technical flaw stems from improper validation of input data lengths during memory allocation or copy operations within the driver's kernel-mode code. When a specifically crafted USB device sends malformed control requests or bulk transfer packets to the host system, the driver fails to adequately check whether the incoming data exceeds the allocated buffer size on the heap. This lack of boundary checking allows an attacker to write beyond the intended memory boundaries, overwriting adjacent heap metadata or function pointers stored in nearby memory structures.
From a technical perspective, this type of vulnerability is classified under CWE-122, which denotes a heap-based buffer overflow. The exploitation mechanism typically involves manipulating the heap layout through precise control of input data sizes and contents to achieve arbitrary code execution within the kernel context. Since the USB video driver operates with high privileges in Ring 0, successfully exploiting this flaw grants an attacker full control over the operating system's core functions. This aligns closely with MITRE ATT&CK technique T1068, which covers exploitation for privilege escalation, specifically through local exploits targeting specific software vulnerabilities to gain elevated access rights that are normally restricted from users and programs.
The operational impact of this vulnerability is severe due to its potential for local privilege escalation. An authorized attacker who has already gained a foothold on the system can leverage this flaw to bypass standard security restrictions and obtain SYSTEM-level privileges. This level of access allows the attacker to install programs, view, change, or delete arbitrary data, and create new accounts with full administrative rights. Furthermore, because the vulnerability resides in a driver that is often loaded during system startup or upon device connection, it may be difficult for endpoint detection solutions to monitor without specific kernel-level visibility tools. The presence of such a flaw undermines the integrity of the entire operating environment, as compromise at this level effectively neutralizes most user-mode security controls including antivirus software and access control lists.
Mitigation strategies primarily rely on timely application of vendor-supplied patches that address the input validation logic within the usbvideo.sys driver. System administrators should ensure that all Windows systems are updated with the latest cumulative updates provided by Microsoft, which typically include fixes for such kernel-level vulnerabilities. In environments where patching is not immediately feasible, network segmentation can help limit exposure to untrusted USB devices. Additionally, enforcing strict device control policies through Group Policy or endpoint protection platforms to restrict the use of unauthorized video capture hardware can reduce the attack surface. Regular auditing of connected peripherals and disabling unused USB ports when not in active use further mitigates the risk of exploitation by physical attackers or insider threats seeking to escalate privileges via this specific driver flaw.