{"api_version":"1","generated_at":"2026-07-18T23:51:57+00:00","cve":"CVE-2025-21817","urls":{"html":"https://cve.report/CVE-2025-21817","api":"https://cve.report/api/cve/CVE-2025-21817.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2025-21817","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-21817"},"summary":{"title":"block: mark GFP_NOIO around sysfs ->store()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nblock: mark GFP_NOIO around sysfs ->store()\n\nsysfs ->store is called with queue freezed, meantime we have several\n->store() callbacks(update_nr_requests, wbt, scheduler) to allocate\nmemory with GFP_KERNEL which may run into direct reclaim code path,\nthen potential deadlock can be caused.\n\nFix the issue by marking NOIO around sysfs ->store()","state":"PUBLISHED","assigner":"Linux","published_at":"2025-02-27 20:16:04","updated_at":"2026-07-18 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resolved:\n\nblock: mark GFP_NOIO around sysfs ->store()\n\nsysfs ->store is called with queue freezed, meantime we have several\n->store() callbacks(update_nr_requests, wbt, scheduler) to allocate\nmemory with GFP_KERNEL which may run into direct reclaim code path,\nthen potential deadlock can be caused.\n\nFix the issue by marking NOIO around sysfs ->store()","Type":"Description","Title":"block: mark GFP_NOIO around sysfs ->store()"}]}}}