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Vulnerability DatabaseCVE-2025-40203
CVE-2025-40203:
Linux Kernel vulnerability analysis and mitigation
Overview
A vulnerability in the Linux kernel has been identified and assigned CVE-2025-40203. The issue relates to the listmount functionality where path_put() is called under namespace semaphore, which could lead to potential system instability. The vulnerability was disclosed on November 12, 2025 (NVD).
Technical details
The vulnerability specifically involves the listmount() function in the Linux kernel, where calling path_put() under the namespace semaphore could result in system issues if the last reference is released. The issue requires massage of the listmount() function to ensure proper handling of path references under namespace operations (Kernel.org).
Impact
If exploited, this vulnerability could potentially lead to system instability when the last reference is released during listmount operations (Ubuntu).
Mitigation and workarounds
The vulnerability has been resolved in the Linux kernel through patches that modify the listmount() function to prevent calling path_put() under the namespace semaphore (NVD).
Additional resources
Source: This report was generated using AI
Related Linux Kernel vulnerabilities:
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