{"id":"CVE-2025-71225","title":"md: suspend array while updating raid_disks via sysfs","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nmd: suspend array while updating raid_disks via sysfs\n\nIn raid1_reshape(), freeze_array() is called before modifying the r1bio\nmemory pool (conf->r1bio_pool) and conf->…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= e2d59925221cd562e07fee38ec8839f7209ae603 < 165d1359f945b72c5f90088f60d48ff46115269e","Linux >= e2d59925221cd562e07fee38ec8839f7209ae603 < 0107b18cd8ac17eb3e54786adc05a85cdbb6ef22","Linux >= e2d59925221cd562e07fee38ec8839f7209ae603 < 2cc583653bbe050bacd1cadcc9776d39bf449740","Linux 1b9203bb4c658c0242afa6fdb025c71d2fc3ad76","Linux 8ccf6cfb157419847f3cb2bfdfbcdbd39860e8e9","Linux >= 3.4.59 < 3.5","Linux >= 3.9.7 < 3.10","Linux 3.10"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-06-10T20:41:16.509027Z"},"published":"2026-02-18","updated":"2026-10-19","sourceUpdated":"2026-10-19T18:25:24.132Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-71225","references":[{"url":"https://git.kernel.org/stable/c/165d1359f945b72c5f90088f60d48ff46115269e"},{"url":"https://git.kernel.org/stable/c/0107b18cd8ac17eb3e54786adc05a85cdbb6ef22"},{"url":"https://git.kernel.org/stable/c/2cc583653bbe050bacd1cadcc9776d39bf449740"}],"tags":["cve.org"],"epss":0.00096,"epssPercentile":0.00678,"ingestedAt":"2026-10-19T18:35:50.125Z","slug":"CVE-2025-71225","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nmd: suspend array while updating raid_disks via sysfs\n\nIn raid1_reshape(), freeze_array() is called before modifying the r1bio\nmemory pool (conf->r1bio_pool) and conf->raid_disks, and\nunfreeze_array() is called after the update is completed.\n\nHowever, freeze_array() only waits until nr_sync_pending and\n(nr_pending - nr_queued) of all buckets reaches zero. When an I/O error\noccurs, nr_queued is increased and the corresponding r1bio is queued to\neither retry_list or bio_end_io_list. As a result, freeze_array() may\nunblock before these r1bios are released.\n\nThis can lead to a situation where conf->raid_disks and the mempool have\nalready been updated while queued r1bios, allocated with the old\nraid_disks value, are later released. Consequently, free_r1bio() may\naccess memory out of bounds in put_all_bios() and release r1bios of the\nwrong size to the new mempool, potentially causing issues with the\nmempool as well.\n\nSince only normal I/O might increase nr_queued while an I/O error occurs,\nsuspending the array avoids this issue.\n\nNote: Updating raid_disks via ioctl SET_ARRAY_INFO already suspends\nthe array. Therefore, we suspend the array when updating raid_disks\nvia sysfs to avoid this issue too.\n\n## Affected\n\n- `Linux >= e2d59925221cd562e07fee38ec8839f7209ae603 < 165d1359f945b72c5f90088f60d48ff46115269e`\n- `Linux >= e2d59925221cd562e07fee38ec8839f7209ae603 < 0107b18cd8ac17eb3e54786adc05a85cdbb6ef22`\n- `Linux >= e2d59925221cd562e07fee38ec8839f7209ae603 < 2cc583653bbe050bacd1cadcc9776d39bf449740`\n- `Linux 1b9203bb4c658c0242afa6fdb025c71d2fc3ad76`\n- `Linux 8ccf6cfb157419847f3cb2bfdfbcdbd39860e8e9`\n- `Linux >= 3.4.59 < 3.5`\n- `Linux >= 3.9.7 < 3.10`\n- `Linux 3.10`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}