CVE-2025-71225

{"id": "CVE-2025-71225", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}, "impactScore": 4.2, "exploitabilityScore": 1.0}]}, "published": "2026-02-18T15:18:40.330", "references": [{"url": "https://git.kernel.org/stable/c/0107b18cd8ac17eb3e54786adc05a85cdbb6ef22", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/165d1359f945b72c5f90088f60d48ff46115269e", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/2cc583653bbe050bacd1cadcc9776d39bf449740", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-367"}]}], "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."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nmd: suspender el array mientras se actualiza raid_disks a trav\u00e9s de sysfs\n\nEn raid1_reshape(), se llama a freeze_array() antes de modificar el pool de memoria r1bio (conf->r1bio_pool) y conf->raid_disks, y se llama a unfreeze_array() despu\u00e9s de que se completa la actualizaci\u00f3n.\n\nSin embargo, freeze_array() solo espera hasta que nr_sync_pending y (nr_pending - nr_queued) de todos los buckets lleguen a cero. Cuando ocurre un error de E/S, nr_queued se incrementa y el r1bio correspondiente se encola en retry_list o bio_end_io_list. Como resultado, freeze_array() puede desbloquearse antes de que estos r1bios sean liberados.\n\nEsto puede llevar a una situaci\u00f3n en la que conf->raid_disks y el mempool ya han sido actualizados mientras que los r1bios encolados, asignados con el valor antiguo de raid_disks, son liberados posteriormente. En consecuencia, free_r1bio() puede acceder a memoria fuera de los l\u00edmites en put_all_bios() y liberar r1bios de tama\u00f1o incorrecto al nuevo mempool, lo que podr\u00eda causar problemas tambi\u00e9n con el mempool.\n\nDado que solo la E/S normal podr\u00eda aumentar nr_queued mientras ocurre un error de E/S, suspender el array evita este problema.\n\nNota: La actualizaci\u00f3n de raid_disks a trav\u00e9s de ioctl SET_ARRAY_INFO ya suspende el array. Por lo tanto, suspendemos el array al actualizar raid_disks a trav\u00e9s de sysfs para evitar este problema tambi\u00e9n."}], "lastModified": "2026-03-18T20:44:55.710", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E389CD90-3A0E-4F77-84C4-CD0E55932013", "versionEndExcluding": "3.5", "versionStartIncluding": "3.4.59"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "961D1B9C-0FC0-409D-AFE8-71D140C4396C", "versionEndExcluding": "3.10", "versionStartIncluding": "3.9.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D79EE388-E36C-4B65-A381-0BFBF2302613", "versionEndExcluding": "6.12.70", "versionStartIncluding": "3.10.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7156C23F-009E-4D05-838C-A2DA417B5B8D", "versionEndExcluding": "6.18.10", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:3.10:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "82D28405-E1F2-43CF-AA38-B228805AFFF9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:3.10:rc6:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2DD6E1E7-AF5F-46ED-A729-288651810FFF"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:3.10:rc7:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7EDF2BC7-2812-4297-9FF3-2CFFE1EE8584"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "17B67AA7-40D6-4AFA-8459-F200F3D7CFD1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C47E4CC9-C826-4FA9-B014-7FE3D9B318B2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F71D92C0-C023-48BD-B3B6-70B638EEE298"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}