Refcount Leak Bug in cpufreq: pmac32-cpufreq

Kernel Updated 02 Oct 2025

Summary

31/07/2022

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2022-1004561: cpufreq: pmac32-cpufreq: Fix refcount leak bug. Affects Kernel versions < 3ea9dbf7c2f436952bca331c6f5d72f75aca224e. No fix is published. How to fix ↓

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Background

The cpufreq package is a component of the Linux Kernel that manages the frequency scaling of CPUs. It allows the system to dynamically adjust the CPU frequency based on workload, optimizing power consumption and performance. The pmac32-cpufreq module is specifically designed for PowerPC-based Macintosh systems. This module handles the frequency scaling for these systems. However, a refcount leak bug has been discovered in pmac32-cpufreq, which can lead to potential security vulnerabilities.

Vulnerability Detail

The refcount leak bug in pmac32-cpufreq arises from improper handling of reference counts, which can result in memory leaks and potential security issues. Attackers may be able to exploit this vulnerability to gain unauthorized access, escalate privileges, or cause denial-of-service conditions. The bug has been fixed in Linux Kernel version v5.10.132 by commit 3ea9dbf7c2f436952bca331c6f5d72f75aca224e.

How To Fix

No fixed version is published for this vulnerability.

To fix the refcount leak bug in pmac32-cpufreq, it is recommended to update the Linux Kernel to version v5.10.132 or later. This can be done by fetching the latest kernel source code from the official Linux Kernel repository (https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/) and compiling it for the target system. Alternatively, users can wait for their Linux distribution to provide an updated kernel package.

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Workaround

There is no specific workaround available for this vulnerability. It is essential to apply the fix by updating the Linux Kernel to the recommended version.

Conclusion

The refcount leak bug in pmac32-cpufreq can pose security risks and should be addressed by updating the Linux Kernel to the recommended version. For further support on vulnerability remediation, please contact DevNack.com.

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