Buffer Eviction Scheduling Issue in Linux Kernel's dm-bufio by Red Hat

CVE-2025-38496

What is CVE-2025-38496?

A vulnerability in the Linux kernel's dm-bufio module allows for a scheduling conflict during buffer eviction, potentially leading to unexpected system behavior. When 'try_verify_in_tasklet' is enabled along with DM_BUFIO_CLIENT_NO_SLEEP, an attempt to evict buffers can invoke a scheduling operation within an atomic context, triggering warnings related to invalid context execution. This issue highlights the need for careful management of buffer processes to maintain system stability and prevent locking issues.

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