{"id":"CVE-2025-71225","state":"PUBLISHED","title":"md: suspend array while updating raid_disks via sysfs","description":"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->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.","publishedAt":"2026-02-18T14:21:46.249Z","updatedAt":"2026-10-21T12:38:36.561Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"e2d59925221cd562e07fee38ec8839f7209ae603","status":"affected","lessThan":"863b9b7be824a6b2c0587532d3ece3022c6dd451","versionType":"git"},{"version":"e2d59925221cd562e07fee38ec8839f7209ae603","status":"affected","lessThan":"165d1359f945b72c5f90088f60d48ff46115269e","versionType":"git"},{"version":"e2d59925221cd562e07fee38ec8839f7209ae603","status":"affected","lessThan":"0107b18cd8ac17eb3e54786adc05a85cdbb6ef22","versionType":"git"},{"version":"e2d59925221cd562e07fee38ec8839f7209ae603","status":"affected","lessThan":"2cc583653bbe050bacd1cadcc9776d39bf449740","versionType":"git"},{"version":"1b9203bb4c658c0242afa6fdb025c71d2fc3ad76","status":"affected","versionType":"git"},{"version":"8ccf6cfb157419847f3cb2bfdfbcdbd39860e8e9","status":"affected","versionType":"git"},{"version":"3.4.59","status":"affected","lessThan":"3.5","versionType":"semver"},{"version":"3.9.7","status":"affected","lessThan":"3.10","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/md.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.10","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.70","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.10","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/md.c"]}],"references":["https://git.kernel.org/stable/c/863b9b7be824a6b2c0587532d3ece3022c6dd451","https://git.kernel.org/stable/c/165d1359f945b72c5f90088f60d48ff46115269e","https://git.kernel.org/stable/c/0107b18cd8ac17eb3e54786adc05a85cdbb6ef22","https://git.kernel.org/stable/c/2cc583653bbe050bacd1cadcc9776d39bf449740"],"weaknesses":["CWE-362"],"ingestedAt":"2026-10-29T20:10:04.440Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/71xxx/CVE-2025-71225.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-71225","state":"PUBLISHED","datePublished":"2026-02-18T14:21:46.249Z","dateUpdated":"2026-10-21T12:38:36.561Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-02-14T16:26:02.969Z"},"containers":{"cna":{"title":"md: suspend array while updating raid_disks via sysfs","descriptions":[{"lang":"en","value":"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->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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"e2d59925221cd562e07fee38ec8839f7209ae603","status":"affected","lessThan":"863b9b7be824a6b2c0587532d3ece3022c6dd451","versionType":"git"},{"version":"e2d59925221cd562e07fee38ec8839f7209ae603","status":"affected","lessThan":"165d1359f945b72c5f90088f60d48ff46115269e","versionType":"git"},{"version":"e2d59925221cd562e07fee38ec8839f7209ae603","status":"affected","lessThan":"0107b18cd8ac17eb3e54786adc05a85cdbb6ef22","versionType":"git"},{"version":"e2d59925221cd562e07fee38ec8839f7209ae603","status":"affected","lessThan":"2cc583653bbe050bacd1cadcc9776d39bf449740","versionType":"git"},{"version":"1b9203bb4c658c0242afa6fdb025c71d2fc3ad76","status":"affected","versionType":"git"},{"version":"8ccf6cfb157419847f3cb2bfdfbcdbd39860e8e9","status":"affected","versionType":"git"},{"version":"3.4.59","status":"affected","lessThan":"3.5","versionType":"semver"},{"version":"3.9.7","status":"affected","lessThan":"3.10","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/md.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.10","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.70","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.10","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/md.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/863b9b7be824a6b2c0587532d3ece3022c6dd451"},{"url":"https://git.kernel.org/stable/c/165d1359f945b72c5f90088f60d48ff46115269e"},{"url":"https://git.kernel.org/stable/c/0107b18cd8ac17eb3e54786adc05a85cdbb6ef22"},{"url":"https://git.kernel.org/stable/c/2cc583653bbe050bacd1cadcc9776d39bf449740"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-21T12:38:36.561Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"6.12.70"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"6.18.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"6.19"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.4.59"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9.7"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2025-71225","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-06-10T20:41:16.509027Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-362","lang":"en","type":"CWE","description":"CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-19T18:25:24.132Z"}}]}}}