Fix sleeping function called from invalid context on RT kernel in Linux Kernel
Summary
GSD-2022-1003835: tracing: Fix sleeping function called from invalid context on RT kernel. Affects Kernel versions < 40f9fde06b25884baa0c4bd138b909a9b67218b4. No fix is published. How to fix ↓
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Background
The Linux Kernel is a widely used open-source operating system kernel that serves as the foundation for various Linux distributions. It provides essential functionality for managing system resources, handling hardware devices, and facilitating communication between software components. The Real-Time (RT) kernel variant is specifically designed to meet the stringent timing requirements of real-time applications. However, a vulnerability has been identified in the RT kernel that involves calling a sleeping function from an invalid context, potentially leading to system instability or crashes.
Vulnerability Detail
The vulnerability in the RT kernel arises from the improper usage of sleeping functions in certain contexts. Sleeping functions are designed to temporarily suspend the execution of a thread or process, allowing other tasks to run. However, calling these functions from invalid contexts, such as interrupt handlers or atomic contexts, can result in unexpected behavior and system instability. Attackers may exploit this vulnerability to cause denial-of-service conditions or execute arbitrary code with elevated privileges. 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 mentioned for this vulnerability.
Conclusion
The vulnerability in the RT kernel that involves calling a sleeping function from an invalid context can potentially lead to system instability or crashes. It is crucial to update the Linux Kernel to version v4.19.247 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The Linux Kernel is the core component of the Linux operating system, responsible for managing system resources and facilitating communication between software components.
A sleeping function is a function that temporarily suspends the execution of a thread or process, allowing other tasks to run.
An RT (Real-Time) kernel is a variant of the Linux Kernel that is specifically designed to meet the stringent timing requirements of real-time applications.
This vulnerability can lead to system instability, crashes, denial-of-service conditions, or the execution of arbitrary code with elevated privileges.
To fix this vulnerability, update the Linux Kernel to version v4.19.247 or later, which includes the necessary fix for this issue.
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