CVE-2025-24055: Critical Out-of-Bounds Read Vulnerability in Windows USB Video Driver

Microsoft has disclosed a critical security vulnerability, CVE-2025-24055, affecting the Windows USB Video Class (UVC) driver. This flaw, classified as an out-of-bounds (OOB) read vulnerability, could allow attackers to execute arbitrary code or crash systems by exploiting improperly handled memory operations in the driver.

Understanding the Vulnerability

The vulnerability resides in the usbvideo.sys driver, which handles communication between Windows and USB video devices like webcams. Attackers can exploit this flaw by sending maliciously crafted USB video packets, triggering an out-of-bounds read that may lead to:

  • System crashes (BSOD)
  • Information disclosure
  • Potential remote code execution (RCE) in certain scenarios

Microsoft has rated this vulnerability as Critical with a CVSS score of 8.8, noting that exploitation is more likely due to the widespread use of USB video devices.

Affected Systems

The vulnerability impacts multiple Windows versions:

  • Windows 10 (versions 1809 and later)
  • Windows 11 (all versions)
  • Windows Server 2019/2022

Systems using USB webcams, video capture devices, or USB-based display adapters are particularly at risk.

Exploitation Scenarios

Security researchers have identified several potential attack vectors:

  1. Malicious USB devices: An attacker could create a specially crafted USB video device that exploits the vulnerability when plugged in.
  2. Man-in-the-Middle attacks: Intercepting and modifying USB video traffic over shared ports.
  3. Malware delivery: Existing malware could leverage this vulnerability for privilege escalation.

Mitigation and Patches

Microsoft released patches in the January 2025 Patch Tuesday update. Users should:

  1. Apply security updates immediately (KB5034205 for most systems)
  2. Disable unnecessary USB video devices if patching isn't immediately possible
  3. Enable memory integrity in Windows Security for additional protection

For enterprise environments, Microsoft recommends:

  • Network device control policies to restrict unauthorized USB devices
  • Application control to block potential exploit attempts
  • Monitoring for crash dumps related to usbvideo.sys

Long-Term Security Implications

This vulnerability highlights ongoing challenges in USB driver security:

  • Complexity of USB protocol handling creates attack surfaces
  • Privileged nature of drivers makes flaws particularly dangerous
  • Increasing sophistication of USB-based attacks

Security experts advise organizations to:

  • Audit USB device usage across their networks
  • Implement device allowlisting where practical
  • Monitor for anomalous USB activity

Detection and Response

Signs of potential exploitation include:

  • Unexpected system crashes with usbvideo.sys mentioned
  • Unusual USB device connections in event logs
  • Memory access violations in security logs

Microsoft Defender for Endpoint and other advanced threat protection solutions can detect exploit attempts targeting this vulnerability.

Future Outlook

This vulnerability is part of a broader trend of USB-related security issues that have emerged in recent years. Microsoft has indicated they're working on:

  • Enhanced driver verification processes
  • Improved memory protections for kernel-mode components
  • Better isolation for USB device handling

Security researchers recommend treating USB peripherals as potential attack vectors and applying defense-in-depth strategies accordingly.