Command Ring Pointer Corruption in xhci
Summary
UVI-2021-1001997: 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 xhci package is a component of the Linux Kernel that provides support for USB 3.0 and later versions. It handles the communication between the host system and USB devices. The command ring is a data structure used by xhci to manage commands sent to USB devices. It keeps track of the commands and their execution status. However, a vulnerability has been discovered in xhci that can lead to command ring pointer corruption while aborting a command.
Vulnerability Detail
The vulnerability in xhci arises when aborting a command, resulting in command ring pointer corruption. This corruption can lead to various issues, including incorrect command execution, system crashes, or even potential security vulnerabilities. An attacker may be able to exploit this vulnerability to execute arbitrary code or gain elevated privileges on the affected system. The vulnerability has been fixed in Linux Kernel version v5.4.155 by commit 01c2dcb67e71c351006dd17cbba86c26b7f61eaf.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround mentioned for this vulnerability. The recommended approach is to apply the fix by updating the Linux Kernel.
Conclusion
The xhci package in the Linux Kernel is vulnerable to command ring pointer corruption while aborting a command. This vulnerability can have severe consequences, including system crashes and potential security risks. It is crucial to update the Linux Kernel to version v5.4.155 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
xhci is a component of the Linux Kernel that provides support for USB 3.0 and later versions. It handles the communication between the host system and USB devices.
The command ring is a data structure used by xhci to manage commands sent to USB devices. It keeps track of the commands and their execution status.
The vulnerability can lead to command ring pointer corruption, resulting in incorrect command execution, system crashes, or potential security vulnerabilities. An attacker may exploit this vulnerability to execute arbitrary code or gain elevated privileges.
To fix the vulnerability, update the Linux Kernel to version v5.4.155 or later. Obtain the updated kernel source code from the official Linux Kernel repository and compile it for the target system.
No specific workaround is mentioned for this vulnerability. It is recommended to apply the fix by updating the Linux Kernel.
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