powerpc/idle: Don't corrupt back chain when going idle

Kernel Updated 02 Oct 2025

Summary

28/10/2021

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2021-1001819: powerpc/idle: Don't corrupt back chain when going idle. Affects Kernel versions >= 80bbb0bc3a0288442f7fe6fc514f4ee1cb06ccb7, < 8e25a62e8dab7bb09da337354ed1be5df61f83a0. No fix is published. How to fix ↓

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Background

The powerpc/idle package is a component of the Linux Kernel that handles the idle state of powerpc processors. It is responsible for managing the transition of the processor to a low-power state when it is not actively processing tasks. The idle state is crucial for power management and energy efficiency in powerpc-based systems.

Vulnerability Detail

The vulnerability in the powerpc/idle package allows for the corruption of the back chain when the processor goes idle. This corruption can lead to various issues, including potential security vulnerabilities. The vulnerability was introduced in version v5.4.156 of the Linux Kernel by commit 80bbb0bc3a0288442f7fe6fc514f4ee1cb06ccb7 and has been fixed in version v5.4.156 by commit 8e25a62e8dab7bb09da337354ed1be5df61f83a0. The impact and attack plausibility of this vulnerability have not been proven yet.

How To Fix

No fixed version is published for this vulnerability.

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Workaround

No specific workaround has been provided for this vulnerability.

Conclusion

The powerpc/idle package in the Linux Kernel is vulnerable to a corruption of the back chain when going idle. It is recommended to update the Linux Kernel to version v5.4.156 or later to mitigate this vulnerability. For further support on vulnerability remediation, you can contact DevNack.com.

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