{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/md/raid1.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "bffbbfcbd9393e315a7a4286dcd70e875265db9a",
              "status": "affected",
              "version": "5aa705039c4fca84575539bfa2b8a28454a3d2ca",
              "versionType": "git"
            },
            {
              "lessThan": "8e065a1602511282fc0da2dc89445e0eb71a681c",
              "status": "affected",
              "version": "5aa705039c4fca84575539bfa2b8a28454a3d2ca",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/md/raid1.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.17"
            },
            {
              "lessThan": "5.17",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.5",
                  "versionStartIncluding": "5.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "5.17",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd/raid1: fix writes_pending and barrier reference leaks on write failures\n\nraid1_make_request() acquires a writes_pending reference with\nmd_write_start() before calling raid1_write_request(). Several failure\npaths in raid1_write_request() complete the bio and return without\nreaching the normal write completion path, causing the corresponding\nmd_write_end() to be skipped.\n\nMake raid1_write_request() return a status indicating whether the write\nrequest was successfully queued. This allows raid1_make_request() to\ncall md_write_end() when raid1_write_request() fails.\n\nAdditionally, if wait_blocked_rdev() fails after wait_barrier()\nsucceeds, the associated barrier reference is not released.\n\nCall allow_barrier() before returning from that path to keep the barrier\naccounting balanced."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - The bug is in md/raid1 write handling reached via block-layer writes to RAID1-backed volumes; on storage servers and appliances, remote NFS, SMB (ksmbd), iSCSI, and NVMe-oF clients submit those writes through md_submit_bio() to raid1_make_request() the same as local I/O.\nAC:L - An attacker with write access can reliably trigger the leaks using RWF_NOWAIT during active resync/barriers, against mirrors in BlockedBadBlocks state after prior write errors, or via bio_submit_split_bioset() failure paths; they control I/O timing and concurrency without uncontrollable races.\nPR:L - Exploitation requires only the ability to issue writes to the RAID1 array\u2014via a mounted filesystem, O_RDWR on /dev/mdX, or an authenticated network storage client\u2014not CAP_SYS_ADMIN or other privileges needed to create or reconfigure the md array.\nUI:N - No victim interaction is required; the attacker or their storage client issues the triggering RWF_NOWAIT or failing write requests directly, with no separate mount, file open, or administrator action needed at exploitation time.\nS:U - Impact is confined to kernel md RAID1 write/barrier accounting and array lifecycle state within the same host kernel; it does not cross VM, container, or IOMMU security boundaries.\nC:N - Leaked writes_pending and nr_pending reference counters do not corrupt memory, read out of bounds, or use-after-free; there is no kernel pointer leak or arbitrary memory disclosure primitive.\nI:L - Skipped md_write_end() on failure paths leaves writes_pending inflated and prevents set_in_sync()/clean sysfs transitions, causing persistent incorrect RAID1 dirty/clean metadata state that cannot be corrected until reboot.\nA:H - Leaked conf-\u003enr_pending from the wait_blocked_rdev()+REQ_NOWAIT path inflates get_unqueued_pending() so freeze_array() wait_event never completes, deadlocking array quiesce, reshape, removal, and read-error recovery while array_frozen blocks new I/O."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:44:14.243Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/bffbbfcbd9393e315a7a4286dcd70e875265db9a"
        },
        {
          "url": "https://git.kernel.org/stable/c/8e065a1602511282fc0da2dc89445e0eb71a681c"
        }
      ],
      "title": "md/raid1: fix writes_pending and barrier reference leaks on write failures",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-72440",
    "datePublished": "2026-08-15T05:56:52.662Z",
    "dateReserved": "2026-08-09T03:40:39.930Z",
    "dateUpdated": "2026-08-17T05:44:14.243Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}