Vulnerability in Kernel package: xhci: Fix command ring abort
Summary
GSD-2021-1002577: xhci: Fix commad ring abort, write all 64 bits to CRCR register. Affects Kernel versions >= ff0e50d3564f33b7f4b35cadeabd951d66cfc570, < fa75f593c867cde772e2d87ca36ab735c4aa4a09. No fix is published. How to fix ↓
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Background
The Kernel package is a crucial component of the Linux operating system, responsible for managing the system's core functionality. It provides essential services and interfaces for hardware, software, and user applications. The xhci module within the Kernel package handles USB host controller drivers. It enables communication between the operating system and USB devices connected to the system. However, a vulnerability has been discovered in the xhci module that affects the command ring abort functionality.
Vulnerability Detail
The vulnerability in the xhci module relates to the improper handling of command ring aborts. When attempting to abort a command, the module fails to write all 64 bits to the Command Ring Control Register (CRCR). This incomplete write operation can lead to unexpected behavior and potential security risks. Although the impact and attack plausibility have not been proven, it is essential to address this vulnerability to ensure the stability and security of the system.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
No workaround has been provided for this vulnerability. It is necessary to apply the fix by updating the Kernel package to the recommended version.
Conclusion
The vulnerability in the xhci module of the Kernel package can be addressed by updating to version v5.15.7 or later. This update ensures that the CRCR register is correctly written during command ring aborts, mitigating potential security risks. For further support and assistance with vulnerability remediation, please contact DevNack.com.
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FAQ
The Kernel package is a fundamental component of the Linux operating system, responsible for managing core system functionality.
The xhci module is a part of the Kernel package that handles USB host controller drivers, facilitating communication between the operating system and USB devices.
The Command Ring Control Register (CRCR) is a register within the xhci module that controls the command ring's behavior, including command aborts.
The incomplete write operation to the CRCR register during command ring aborts can lead to unexpected behavior and potential security risks, although the exact impact and attack plausibility have not been proven.
To fix this vulnerability, update the Linux Kernel package to version v5.15.7 or later, which includes the necessary fix for the xhci module.
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