Memory Leak in Linux Kernel Affects Online DAMON Parameters Commit

CVE-2025-40227

What is CVE-2025-40227?

A vulnerability has been identified in the Linux kernel concerning the deallocation of memory associated with the damon_ctx used for testing online DAMON parameters. When DAMON parameters are successfully committed, the memory allocated for the testing context is not released, resulting in a memory leak that exacerbates resource consumption on affected systems. This defect can lead to performance degradation over time as system resources are exhausted. A proposed fix addresses this issue by ensuring that memory is appropriately deallocated regardless of the commit outcome, thus preventing memory leaks.

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