Critical Vulnerability in Linux Kernel: Type Confusion in Socket Management
Summary
DEBIAN-CVE-2025-38475: In the Linux kernel, the following vulnerability has been resolved: smc: Fix various oops due to inet_sock type confusion. Affects linux versions < 6.12.41-1. Fixed in 6.12.41-1. How to fix ↓
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Background
The Linux kernel is the core component of many operating systems, managing hardware resources and providing essential services for software applications. It is known for its stability, performance, and security features. However, vulnerabilities can arise, affecting its functionality and security. This specific vulnerability relates to the socket management component, which is crucial for network communication.
Vulnerability Detail
In the Linux kernel, a vulnerability has been identified that stems from type confusion in the socket management code. This issue allows for the creation of an smc_sock as an INET socket, leading to potential double-free errors and memory corruption. The root cause is that the struct smc_sock does not properly inherit from struct inet_sock, causing confusion in memory management and potentially leading to system crashes or exploitation by malicious actors.
How To Fix
Minimum fixed version
6.12.41-1
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 workarounds are provided for this vulnerability. It is recommended to apply the patch as soon as it is available.
Conclusion
The identified vulnerability in the Linux kernel poses significant risks due to type confusion in socket management. Users are urged to update their systems to the patched versions to mitigate these risks. Monitoring tools like Vulert can assist in identifying vulnerabilities in real-time.
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FAQ
The vulnerability is a type confusion issue in the Linux kernel's socket management, which can lead to memory corruption and crashes.
You can use tools like Vulert to monitor and alert for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected.
The risks include system crashes, memory corruption, and potential exploitation by attackers to gain unauthorized access.
Yes, patches are available for Debian 13 (version 6.12.41-1) and Debian 14 (version 6.16.3-1).
While no specific workarounds are available, it is crucial to monitor your system for any unusual behavior and plan to apply the patch as soon as possible.
References
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