Vulnerability in cpufreq: schedutil in Kernel
Summary
GSD-2021-1001564: cpufreq: schedutil: Use kobject release() method to free sugov_tunables. Affects Kernel versions >= 9bdcb44e391da5c41b98573bf0305a0e0b1c9569, < 30d57cf2c4116ca6d34ecd1cac94ad84f8bc446c. No fix is published. How to fix ↓
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Background
The cpufreq package in the Linux Kernel is responsible for managing the frequency scaling of CPUs. It provides a framework for adjusting the CPU frequency based on system load and power-saving requirements. The schedutil governor is a component of cpufreq that dynamically adjusts the CPU frequency based on the CPU utilization. This vulnerability affects the schedutil governor and its handling of the sugov_tunables data structure.
Vulnerability Detail
The vulnerability in cpufreq: schedutil arises from the improper handling of the sugov_tunables data structure. The schedutil governor does not correctly free the memory allocated for sugov_tunables, leading to a potential memory leak. An attacker could potentially exploit this vulnerability to exhaust system memory resources, resulting in a denial-of-service condition. 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 vulnerability in cpufreq: schedutil in the Linux Kernel could potentially result in a denial-of-service condition. It is recommended to update the Kernel to the latest version to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
cpufreq is a package in the Linux Kernel that manages the frequency scaling of CPUs. It provides mechanisms for adjusting the CPU frequency based on system load and power-saving requirements.
The schedutil governor is a component of cpufreq that dynamically adjusts the CPU frequency based on the CPU utilization. It aims to balance performance and power consumption.
The impact of this vulnerability is not yet proven. However, if successfully exploited, it could lead to a denial-of-service condition by exhausting system memory resources.
To fix this vulnerability, update the Linux Kernel to version v4.19.209 or later, which includes the necessary fix for this issue.
No specific workaround has been provided for this vulnerability.
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