Kernel Configuration Management Vulnerability in Linux Systems

CVE-2025-38131

What is CVE-2025-38131?

A vulnerability exists within the Linux kernel's configuration management that can lead to a Use After Free (UAF) condition. This issue arises when an active configuration is enabled via a sysfs interface, allowing a race condition between two CPUs. Specifically, while one CPU is activating a configuration, another CPU can inadvertently deactivate it, leading to access of a previously freed configuration descriptor. To mitigate this risk, it is necessary to correctly manage reference counts for active configurations, ensuring safe module unloading and preventing potential exploitation.

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References