Critical Mutex to Spinlock Conversion Vulnerability in Linux Kernel Package
Summary
DEBIAN-CVE-2025-38392: In the Linux kernel, the following vulnerability has been resolved: idpf: convert control queue mutex to a spinlock With VIRTCHNL2_CAP_MACFILTER enabled, the following warning is generated on module load: [ 324.701677] B... Affects linux versions < 6.12.37-1. Fixed in 6.12.37-1. How to fix ↓
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Background
The Linux kernel is the core component of the Linux operating system, responsible for managing hardware resources and providing essential services to software applications. It is known for its stability, performance, and security features. However, vulnerabilities can arise, affecting its functionality and security posture. This specific vulnerability relates to the idpf module within the kernel, which handles network interface functionalities.
Vulnerability Detail
In the Linux kernel, a vulnerability has been identified where a mutex was improperly used in the idpf module, leading to potential deadlocks and system instability. The issue arises when the VIRTCHNL2_CAP_MACFILTER feature is enabled, causing a warning during module load due to a sleeping function being called from an invalid context. This can lead to unexpected behavior in network management processes, potentially compromising system reliability and performance.
How To Fix
Minimum fixed version
6.12.37-1
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, no specific workaround has been provided for this vulnerability. Users are advised to apply the patch as soon as it is available to mitigate risks associated with this issue.
Conclusion
The identified vulnerability in the Linux kernel's idpf module poses significant risks to system stability and performance. Users are strongly encouraged to update to the patched version to ensure their systems remain secure and reliable. Utilizing tools like Vulert can help monitor for such vulnerabilities in real-time.
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FAQ
The vulnerability involves the improper use of a mutex in the Linux kernel's idpf module, which can lead to system instability.
You can use the Vulert platform to monitor and alert for open-source vulnerabilities in your software. Check your application against the vulnerability using the Vulert playground.
If exploited, this vulnerability could lead to deadlocks, system crashes, or degraded network performance, affecting overall system reliability.
Yes, a patch is available in the form of an updated kernel version 6.12.37-1. Users should update their systems to this version.
While no specific workaround is available, it is crucial to prioritize applying the patch as soon as possible to mitigate risks.
References
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