CVE-2024-42250

Summary

CVE-2024-42250 is a vulnerability affecting the Linux kernel. It was identified in the 'cachefiles' subsystem where lock protection was missing during polling routines. Specifically, when iterating through a radix tree in the 'xarray', the data structure stored in the slot, such as 'struct cachefiles_req', does not have a guarantee to be pinned. As a result, the poll routine dereferences this structure without proper protection, leading to a potential race condition. To mitigate this issue, a spinlock is required to ensure proper synchronization and prevent unintended data access.

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