FKIE_CVE-2025-71225

Vulnerability from fkie_nvd - Published: 2026-02-18 15:18 - Updated: 2026-06-17 10:03
Severity
5.3 (Medium) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: md: suspend array while updating raid_disks via sysfs In raid1_reshape(), freeze_array() is called before modifying the r1bio memory pool (conf->r1bio_pool) and conf->raid_disks, and unfreeze_array() is called after the update is completed. However, freeze_array() only waits until nr_sync_pending and (nr_pending - nr_queued) of all buckets reaches zero. When an I/O error occurs, nr_queued is increased and the corresponding r1bio is queued to either retry_list or bio_end_io_list. As a result, freeze_array() may unblock before these r1bios are released. This can lead to a situation where conf->raid_disks and the mempool have already been updated while queued r1bios, allocated with the old raid_disks value, are later released. Consequently, free_r1bio() may access memory out of bounds in put_all_bios() and release r1bios of the wrong size to the new mempool, potentially causing issues with the mempool as well. Since only normal I/O might increase nr_queued while an I/O error occurs, suspending the array avoids this issue. Note: Updating raid_disks via ioctl SET_ARRAY_INFO already suspends the array. Therefore, we suspend the array when updating raid_disks via sysfs to avoid this issue too.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0107b18cd8ac17eb3e54786adc05a85cdbb6ef22Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/165d1359f945b72c5f90088f60d48ff46115269ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2cc583653bbe050bacd1cadcc9776d39bf449740Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 3.10
linux linux_kernel 3.10
linux linux_kernel 3.10
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/md/md.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "e2d59925221cd562e07fee38ec8839f7209ae603",
              "versionType": "git"
            },
            {
              "lessThan": "0107b18cd8ac17eb3e54786adc05a85cdbb6ef22",
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            },
            {
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              "status": "affected",
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            },
            {
              "status": "affected",
              "version": "1b9203bb4c658c0242afa6fdb025c71d2fc3ad76",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "8ccf6cfb157419847f3cb2bfdfbcdbd39860e8e9",
              "versionType": "git"
            },
            {
              "lessThan": "3.5",
              "status": "affected",
              "version": "3.4.59",
              "versionType": "semver"
            },
            {
              "lessThan": "3.10",
              "status": "affected",
              "version": "3.9.7",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/md/md.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.10"
            },
            {
              "lessThan": "3.10",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.70",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
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          "negate": false,
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      ]
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  ],
  "cveTags": [],
  "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-\u003er1bio_pool) and conf-\u003eraid_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-\u003eraid_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-\u0026gt;r1bio_pool) y conf-\u0026gt;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-\u0026gt;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."
    }
  ],
  "id": "CVE-2025-71225",
  "lastModified": "2026-06-17T10:03:54.523",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.0,
        "impactScore": 4.2,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-71225",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-06-10T20:41:16.509027Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-02-18T15:18:40.330",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/0107b18cd8ac17eb3e54786adc05a85cdbb6ef22"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/165d1359f945b72c5f90088f60d48ff46115269e"
    },
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    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-367"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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