MEDIUMCVSS 5.5

CVE-2025-21817

CVE-2025-21817 updated by NVD

Modified: 2026-09-09
Sources: nvd

Summary

In the Linux kernel, the following vulnerability has been resolved: block: mark GFP_NOIO around sysfs ->store() sysfs ->store is called with queue freezed, meantime we have several ->store() callbacks(update_nr_requests, wbt, scheduler) to allocate memory with GFP_KERNEL which may run into direct reclaim code path, then potential deadlock can be caused. Fix the issue by marking NOIO around sysfs ->store()

References

https://nvd.nist.gov/vuln/detail/CVE-2025-21817

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