Infinite Retry Loop Vulnerability in Linux Kernel Affecting Debian Packages
Summary
CVE-2025-38727: In the Linux kernel, the following vulnerability has been resolved: netlink: avoid infinite retry looping in netlink_unicast() netlink_attachskb() checks for the socket's read memory allocation constraints. Affects linux versions 5.10.103-1 – 6.9.9-1. No fix is published. How to fix ↓
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Background
The Linux kernel is the core component of the Debian operating system, responsible for managing system resources and providing essential services to applications. It is known for its stability, performance, and security features. However, vulnerabilities can arise, impacting its functionality and security. This specific vulnerability affects multiple Debian versions, including Debian 11, 12, 13, and 14, highlighting the importance of timely updates and patches.
Vulnerability Detail
In the Linux kernel, a vulnerability has been identified in the netlink subsystem, specifically in the netlink_unicast() function. This issue arises from improper checks in netlink_attachskb(), which fails to adequately verify the socket's read memory allocation constraints. As a result, the function can enter an infinite retry loop, causing system stalls and potential denial of service. The vulnerability is characterized by a self-detected stall on the CPU, leading to significant performance degradation and system instability.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
Currently, there are no specific workarounds provided for this vulnerability. It is recommended to apply the patch as soon as it becomes available to mitigate the risk.
Conclusion
The CVE-2025-38727 vulnerability in the Linux kernel poses significant risks to Debian systems, including potential system stalls and performance issues. It is crucial for users to apply the necessary updates to mitigate these risks and ensure system stability.
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FAQ
CVE-2025-38727 is a vulnerability in the Linux kernel that can cause an infinite retry loop in the netlink subsystem, leading to system stalls.
The vulnerability affects Debian versions 11, 12, 13, and 14.
You can use the Vulert platform to monitor and alert for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected by this vulnerability.
The vulnerability can lead to system stalls, performance degradation, and potential denial of service, impacting the overall stability of the system.
You can update your Linux kernel by running the command: sudo apt-get update && sudo apt-get upgrade linux in your terminal.
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