Vulnerability in Kernel: xhci Command Ring Abort
Summary
GSD-2021-1002421: xhci: Fix commad ring abort, write all 64 bits to CRCR register. Affects Kernel versions >= 62c182b5e763e5f4062e72678e72ce3e02dd4d1b, < abba418a9c73dcffecbe19ef93c7ae5d2e8e38d3. No fix is published. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Background
The Kernel is a critical component of the Linux operating system that provides core functionalities and interfaces with hardware devices. It manages system resources, facilitates communication between software and hardware, and ensures the stability and security of the system. The xhci (eXtensible Host Controller Interface) is a driver in the Kernel responsible for managing USB 3.0 and USB 2.0 host controllers. It enables communication between the host system and USB devices. However, a vulnerability has been identified in the xhci driver that could potentially lead to security issues.
Vulnerability Detail
The vulnerability in the xhci driver involves an incorrect handling of the Command Ring Control Register (CRCR). When aborting a command ring, the driver fails to write all 64 bits to the CRCR register, resulting in an incomplete operation. This flaw could be exploited by an attacker to manipulate the command ring and potentially execute arbitrary code or cause a denial-of-service condition. The impact and attack plausibility of this vulnerability have not been proven yet.
How To Fix
No fixed version is published for this vulnerability.
Tip — Not sure whether your app is affected? Vulert can check the versions your app actually runs. Scan free →
Workaround
No specific workaround has been provided for this vulnerability.
Conclusion
The vulnerability in the xhci driver of the Kernel could potentially lead to security issues if exploited. It is crucial to update the Linux Kernel to version v4.19.220 or later to fix this vulnerability. By applying the recommended fix, the xhci driver will correctly handle command ring aborts, reducing the risk of arbitrary code execution or denial-of-service attacks. For further support on vulnerability remediation, you can contact DevNack.com.
See every vulnerability recorded for Kernel →
FAQ
The xhci driver is responsible for managing USB 3.0 and USB 2.0 host controllers in the Linux Kernel. It enables communication between the host system and USB devices.
The Command Ring Control Register (CRCR) is a register used by the xhci driver to control the command ring, which is responsible for queuing and executing commands for USB devices.
Exploiting this vulnerability could allow an attacker to manipulate the command ring and potentially execute arbitrary code or cause a denial-of-service condition.
The impact and attack plausibility of this vulnerability have not been proven yet. However, it is still important to apply the recommended fix to mitigate any potential risks.
To update the Linux Kernel, you can follow the official documentation provided by your Linux distribution or refer to the Kernel's official website for instructions.
Related vulnerabilities
Recent vulnerabilities recorded for Kernel.
