powerpc/idle: Don't corrupt back chain when going idle
Summary
GSD-2021-1002047: powerpc/idle: Don't corrupt back chain when going idle. Affects Kernel versions >= fbd724c49bead048ae9fc1a5b7bff2fb3e54f855, < c5c2a80368e97ac179d6a101c99f1e1f36146ec2. No fix is published. How to fix ↓
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Background
The powerpc/idle package is a component of the Linux Kernel, which is responsible for managing the idle state of powerpc processors. When a powerpc processor is idle, the powerpc/idle module is invoked to perform various tasks to conserve power and optimize performance. However, a vulnerability has been discovered in this module that can lead to corruption of the back chain when the processor goes idle.
Vulnerability Detail
The vulnerability in powerpc/idle occurs when the module corrupts the back chain during the idle state. This corruption can potentially lead to various security issues, although the exact impact and attack vectors have not been proven. The vulnerability was introduced in version v5.10.76 of the Linux Kernel and has been fixed in version v5.10.76 by commit c5c2a80368e97ac179d6a101c99f1e1f36146ec2.
How To Fix
No fixed version is published for this vulnerability.
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Conclusion
The powerpc/idle module in the Linux Kernel has a vulnerability that can lead to the corruption of the back chain when the processor goes idle. It is recommended to update the Linux Kernel to version v5.10.76 or later to mitigate this vulnerability. For further support on vulnerability remediation, you can contact DevNack.com.
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FAQ
powerpc/idle is a module in the Linux Kernel that manages the idle state of powerpc processors.
The impact of this vulnerability is not yet proven, but it has the potential to lead to security issues.
You can use Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your package-lock.json file and Vulert will analyze it for any open-source vulnerabilities, including this one.
No specific workaround has been provided for this vulnerability. It is recommended to update the Linux Kernel to the fixed version.
You can find more information about this vulnerability in the vulnerability database maintained by the Cloud Security Alliance. The specific vulnerability ID is GSD-2021-1002047.
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