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md: suspend array while updating raid_disks via sysfs

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2025-71225

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2025-71225

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "e2d59925221cd562e07fee38ec8839f7209ae603",
        "lessThan": "863b9b7be824a6b2c0587532d3ece3022c6dd451",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e2d59925221cd562e07fee38ec8839f7209ae603",
        "lessThan": "165d1359f945b72c5f90088f60d48ff46115269e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e2d59925221cd562e07fee38ec8839f7209ae603",
        "lessThan": "0107b18cd8ac17eb3e54786adc05a85cdbb6ef22",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e2d59925221cd562e07fee38ec8839f7209ae603",
        "lessThan": "2cc583653bbe050bacd1cadcc9776d39bf449740",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "1b9203bb4c658c0242afa6fdb025c71d2fc3ad76",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8ccf6cfb157419847f3cb2bfdfbcdbd39860e8e9",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "3.4.59",
        "lessThan": "3.5",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "3.9.7",
        "lessThan": "3.10",
        "versionType": "semver"
      }
    ],
    "programFiles": [
      "drivers/md/md.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.10"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.10",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "6.6.160",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.70",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.10",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "6.19",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/md/md.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2025-71225

Source reference: /cveMetadata/cveId

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Event
#46086 · Revision 1
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