Vulnerability in Kernel: xhci Command Ring Pointer Corruption
Summary
GSD-2021-1001832: xhci: Fix command ring pointer corruption while aborting a command. Affects Kernel versions < 01c2dcb67e71c351006dd17cbba86c26b7f61eaf. No fix is published. How to fix ↓
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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 overall 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 later devices. It controls the USB host controller, handles device enumeration, and manages data transfers between the host and connected USB devices.
Vulnerability Detail
The xhci driver in the Kernel is vulnerable to command ring pointer corruption while aborting a command. This vulnerability could be exploited by an attacker to manipulate the command ring pointer, leading to potential memory corruption or arbitrary code execution. The corruption of the command ring pointer can occur when aborting a command, causing the driver to incorrectly update the pointer and potentially overwrite memory in an unintended manner. The impact of this vulnerability depends on the attacker's ability to trigger the specific conditions required for the corruption to occur.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround provided for this vulnerability. It is recommended to apply the fix by updating the Linux Kernel to the patched version.
Conclusion
The vulnerability in the xhci driver of the Kernel, which could result in command ring pointer corruption, has been identified and addressed. To ensure the security and stability of the system, it is crucial to update the Linux Kernel to version v5.4.155 or later. For further assistance or support in vulnerability remediation, please contact DevNack.com.
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FAQ
The Kernel is a critical component of the Linux operating system that provides core functionalities and interfaces with hardware devices.
The xhci driver is responsible for managing USB 3.0 and later devices in the Linux Kernel. It controls the USB host controller, handles device enumeration, and manages data transfers between the host and connected USB devices.
Command ring pointer corruption refers to the manipulation or incorrect updating of the command ring pointer in the xhci driver. This can lead to memory corruption or arbitrary code execution.
The potential consequences of this vulnerability include memory corruption, which can lead to system instability or crashes, and the possibility of arbitrary code execution by an attacker.
To fix this vulnerability, update the Linux Kernel to version v5.4.155 or later, which includes the necessary fix for the xhci driver.
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