Kernel Vulnerability in Linux Package: Potential Kthread Mismanagement
Summary
DEBIAN-CVE-2024-46788: In the Linux kernel, the following vulnerability has been resolved: tracing/osnoise: Use a cpumask to know what threads are kthreads The start_kthread() and stop_thread() code was not always called with the interface_loc... Affects linux versions < 6.10.11-1. Fixed in 6.10.11-1. How to fix ↓
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Background
The Linux package is a core component of the Debian operating system, providing essential functionalities for managing system resources and hardware interactions. It is widely used across various distributions and is critical for system stability and performance. This specific vulnerability affects the kernel's handling of kernel threads (kthreads), which are essential for executing background tasks in the operating system.
Vulnerability Detail
In the Linux kernel, a vulnerability has been identified in the tracing/osnoise subsystem where the start_kthread() and stop_thread() functions were not consistently called with the interface_lock held. This oversight could lead to unexpected changes in the kthread variable, resulting in premature calls to kthread_stop() on user space threads. Such behavior can cause a general protection fault, potentially crashing the system and leading to data loss or corruption. The issue was introduced in earlier versions and has been fixed in version 6.10.11-1.
How To Fix
Minimum fixed version
6.10.11-1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade linuxTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
Currently, there are no specific workarounds mentioned for this vulnerability. It is highly recommended to apply the patch as soon as possible to mitigate the risks associated with this issue.
Conclusion
The identified vulnerability in the Linux kernel poses significant risks to system stability and security. Users are urged to update to the patched version to mitigate these risks. Regular updates and monitoring for vulnerabilities are essential practices for maintaining a secure environment.
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FAQ
The vulnerability involves improper handling of kernel threads, which can lead to system crashes.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
Exploitation of this vulnerability can lead to system instability, crashes, and potential data loss.
Yes, the vulnerability has been patched in version 6.10.11-1 of the Linux package.
It is recommended to regularly check for updates and apply them to ensure your system is secure and stable.
References
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