Fix sleeping function called from invalid context on RT kernel in Kernel
Summary
GSD-2022-1003488: tracing: Fix sleeping function called from invalid context on RT kernel. Affects Kernel versions < 1788e6dbb61286215442b1af99e51405a6206762. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system that manages system resources and facilitates communication between hardware and software. It is responsible for tasks such as process management, memory management, and device drivers. The vulnerability in question pertains to the RT (Real-Time) kernel, which is designed for applications that require precise timing and low-latency response. The vulnerability allows a sleeping function to be called from an invalid context, potentially leading to system instability and crashes.
Vulnerability Detail
The vulnerability arises from the improper usage of sleeping functions in the RT kernel. When a sleeping function is called from an invalid context, it can disrupt the normal flow of execution and cause the system to hang or crash. This vulnerability can be exploited by an attacker to disrupt the operation of a system running the affected RT kernel. The impact of this vulnerability can range from denial of service to potential privilege escalation, depending on the specific context in which the sleeping function is called.
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. The recommended course of action is to update the Linux Kernel to the patched version as mentioned in the 'how_to_fix' section.
Conclusion
The vulnerability in the Kernel, specifically in the RT kernel, allows a sleeping function to be called from an invalid context, potentially leading to system instability and crashes. To mitigate this vulnerability, it is crucial to update the Linux Kernel to version v5.10.122 or later. This update ensures that the sleeping function is called from valid contexts, reducing the risk of exploitation. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability can range from denial of service to potential privilege escalation, depending on the specific context in which the sleeping function is called.
You can use tools like Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Vulert Playground allows you to analyze your application's manifest file, such as package-lock.json, and provides real-time alerts for open-source vulnerabilities.
There is no specific workaround mentioned for this vulnerability. The recommended course of action is to update the Linux Kernel to the patched version.
The exact exploitability of this vulnerability depends on the specific context in which the sleeping function is called. However, in general, if an attacker can trigger the execution of the vulnerable code remotely, they may be able to exploit this vulnerability.
There are no known instances of this vulnerability being exploited in the wild. However, it is always recommended to apply security patches and updates to mitigate potential risks.
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