Fix crashes when toggling entry flush barrier in Kernel

Kernel Updated 02 Oct 2025

Summary

31/05/2021

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2021-1000444: powerpc/64s: Fix crashes when toggling entry flush barrier. Affects Kernel versions >= f69bb4e51f41973fb7594be1479fa689831efe1a, < 2db22ba4e0e103f00e0512e0ecce36ac78c644f8. 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 functionality and manages system resources. It serves as the interface between hardware and software, enabling communication and coordination between different components. The vulnerability in question affects the powerpc/64s module of the Kernel. This module is responsible for handling powerpc architecture-specific operations on 64-bit systems. The vulnerability can lead to crashes when toggling the entry flush barrier, potentially impacting system stability and availability.

Vulnerability Detail

The vulnerability arises from a flaw in the powerpc/64s module of the Kernel. When toggling the entry flush barrier, the system crashes due to an error in the code. This vulnerability can be exploited by an attacker to disrupt system operations and potentially execute arbitrary code. The impact of this vulnerability includes system instability, crashes, and potential unauthorized access to sensitive information. It is important to note that the actual attack plausibility and impact have not been proven yet.

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. However, applying the recommended fix by updating the Kernel to the latest version is the most effective way to address the issue.

Conclusion

The vulnerability in the powerpc/64s module of the Kernel can lead to crashes when toggling the entry flush barrier. It is crucial to update the Kernel to version v4.19.191 or later to mitigate this vulnerability. Failure to address this issue may result in system instability, crashes, and potential unauthorized access. For further support on vulnerability remediation, please contact DevNack.com.

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