Vulnerability in Kernel Package: xhci - Preventing Futile URB Re-submissions
Summary
GSD-2022-1000882: xhci: Prevent futile URB re-submissions due to incorrect return value. Affects Kernel versions >= 203a86613fb3bf2767335659513fa98563a3eb71, < 1879db4f25212f5f946fd88207e56ac107632a58. No fix is published. How to fix ↓
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Background
The Kernel package is a critical component of the Linux operating system that provides core functionalities and interfaces between the hardware and software layers. It includes various subsystems, such as xhci, which handles USB host controller drivers. The xhci subsystem manages USB devices and their communication with the system. However, a vulnerability has been identified in the xhci subsystem that can lead to futile URB (USB Request Block) re-submissions due to an incorrect return value.
Vulnerability Detail
The vulnerability in the xhci subsystem allows for futile URB re-submissions, which can have several implications. When a URB is submitted to the xhci subsystem, it expects a specific return value indicating the success or failure of the submission. However, due to an incorrect return value, the system may mistakenly interpret failed submissions as successful, leading to re-submissions of the same URB. This can result in excessive resource consumption, potential system instability, and denial-of-service conditions. The vulnerability was introduced in version v3.11 of the Linux Kernel and has been fixed in version v5.4.182.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, users can disable the xhci subsystem if it is not essential for their system's functionality. This can be achieved by modifying the system's configuration files or disabling the corresponding kernel module. However, it is important to note that disabling the xhci subsystem may result in the loss of USB functionality.
Conclusion
The vulnerability in the xhci subsystem of the Kernel package can lead to futile URB re-submissions, potentially causing resource exhaustion and system instability. It is recommended to update the Kernel package to version v5.4.182 or later to address this vulnerability. Alternatively, users can disable the xhci subsystem as a temporary workaround. For further assistance or support in vulnerability remediation, please contact DevNack.com.
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FAQ
The xhci subsystem is responsible for managing USB host controller drivers in the Linux Kernel. It handles the communication between USB devices and the operating system.
URBs (USB Request Blocks) are data structures used for communication between USB devices and the operating system. They contain information about the data transfer, such as the endpoint, buffer, and transfer type.
The vulnerability can lead to excessive resource consumption, system instability, and denial-of-service conditions. It may also impact the functionality of USB devices connected to the system.
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As of now, there are no known exploits for this vulnerability. However, it is crucial to apply the recommended fix or workaround to mitigate any potential risks.
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