Use-after-free vulnerability in arch_topology package
Summary
GSD-2021-1001187: arch_topology: Avoid use-after-free for scale_freq_data. Affects Kernel versions >= 01e055c120a46e78650b5f903088badbbdaae9ad, < ccdf7e073170886bc370c613e269de610a794c4a. No fix is published. How to fix ↓
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Background
The arch_topology package is a component of the Linux Kernel, which is responsible for managing the topology of the system architecture. It provides information about the relationships between different components, such as CPUs and caches, in a hierarchical manner. This information is crucial for optimizing system performance and power consumption. However, a use-after-free vulnerability has been discovered in the arch_topology package, which can lead to potential security risks.
Vulnerability Detail
The use-after-free vulnerability in the arch_topology package arises from improper handling of scale_freq_data. This vulnerability can be exploited by an attacker to execute arbitrary code or cause a denial-of-service condition. When scale_freq_data is freed and subsequently accessed, it may result in memory corruption or unexpected behavior. The impact and attack plausibility of this vulnerability have not been proven yet.
How To Fix
No fixed version is published for this vulnerability.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.13.4 or later. The fix for this vulnerability was implemented in commit ccdf7e073170886bc370c613e269de610a794c4a. Updating the kernel will ensure that the use-after-free issue related to scale_freq_data is resolved.
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Workaround
As a workaround, users can avoid the use of scale_freq_data in their applications or scripts until the Linux Kernel is updated to a patched version. By refraining from accessing scale_freq_data, the risk of triggering the use-after-free vulnerability can be mitigated.
Conclusion
The use-after-free vulnerability in the arch_topology package can pose significant security risks if exploited. It is crucial to update the Linux Kernel to a patched version to mitigate this vulnerability. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The arch_topology package is a component of the Linux Kernel that manages the system architecture's topology, providing information about the relationships between different components.
A use-after-free vulnerability occurs when a program continues to use a memory area after it has been freed, leading to potential security risks and unexpected behavior.
scale_freq_data is a specific data structure or variable within the arch_topology package that is susceptible to the use-after-free vulnerability.
Exploiting this vulnerability can allow an attacker to execute arbitrary code or cause a denial-of-service condition, depending on how it is leveraged.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.13.4 or later, which includes the necessary patch to address the use-after-free issue.
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