Data Race Vulnerability in Linux Kernel Workqueue Management
Summary
DEBIAN-CVE-2024-46704: In the Linux kernel, the following vulnerability has been resolved: workqueue: Fix spruious data race in flush_work() When flushing a work item for cancellation, flush_work() knows that it exclusively owns the work item... Affects linux versions < 6.10.7-1. Fixed in 6.10.7-1. How to fix ↓
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Background
The Linux kernel is the core component of many operating systems, providing essential services for hardware and software interactions. It manages system resources, including CPU, memory, and device drivers. The kernel's workqueue subsystem allows for deferred execution of work items, enhancing efficiency and responsiveness. However, vulnerabilities in this subsystem can lead to critical issues, such as data races, which can compromise system stability and security.
Vulnerability Detail
In the Linux kernel, a vulnerability was identified in the workqueue subsystem, specifically in the __flush_work() function. This issue arose from a code change that introduced a read of the work item's data before confirming the context of cancellation. This oversight could lead to spurious data race detection by KCSAN (Kernel Concurrency Sanitizer), potentially causing unpredictable behavior in the kernel. The vulnerability is characterized by a race condition that could be exploited, leading to system crashes or erratic behavior.
How To Fix
Minimum fixed version
6.10.7-1
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 provided for this vulnerability. It is advisable to apply the patch as soon as it is available to mitigate any risks associated with this issue.
Conclusion
The vulnerability in the Linux kernel's workqueue management poses significant risks to system stability and security. It is crucial for users to update their systems to the patched version to mitigate these risks. Utilizing tools like Vulert can help monitor and manage vulnerabilities effectively.
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FAQ
The vulnerability is a data race condition in the Linux kernel's workqueue management, which can lead to unpredictable behavior and system instability.
You can use Vulert, which monitors open-source vulnerabilities in your software. By uploading your manifest file like package-lock.json, you can check for vulnerabilities without needing to install any software.
Exploitation of this vulnerability could lead to system crashes, erratic behavior, or other stability issues, impacting the overall performance of the operating system.
Yes, a patch is available in version 6.10.7-1 of the Linux package. It is recommended to update to this version to mitigate the vulnerability.
You can use Vulert's playground to monitor and receive alerts for open-source vulnerabilities in your software in real-time, ensuring you are always up to date.
References
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