CVE-2026-72437 (GCVE-0-2026-72437)
Vulnerability from cvelistv5
Published
2026-08-15 05:56
Modified
2026-08-17 05:14
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: md/raid1: free r1_bio when REQ_NOWAIT is set and read would block on retry When a read is retried, raid1_read_request() may be called with a pre-allocated r1_bio. If wait_read_barrier() fails for a REQ_NOWAIT read, the bio is completed and the function returns immediately. In this case the existing r1_bio is leaked. This fixes a leak of pre-allocated r1_bio structures for retried reads.
References
Impacted products
Vendor Product Version
Linux Linux Version: 5aa705039c4fca84575539bfa2b8a28454a3d2ca
Version: 5aa705039c4fca84575539bfa2b8a28454a3d2ca
Version: 5aa705039c4fca84575539bfa2b8a28454a3d2ca
Version: 5aa705039c4fca84575539bfa2b8a28454a3d2ca
Version: 5aa705039c4fca84575539bfa2b8a28454a3d2ca
Version: 5aa705039c4fca84575539bfa2b8a28454a3d2ca
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/md/raid1.c"
          ],
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        {
          "defaultStatus": "affected",
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          "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"
            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "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": "6.1.178",
                  "versionStartIncluding": "5.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.145",
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                  "vulnerable": true
                },
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd/raid1: free r1_bio when REQ_NOWAIT is set and read would block on retry\n\nWhen a read is retried, raid1_read_request() may be called with a\npre-allocated r1_bio. If wait_read_barrier() fails for a REQ_NOWAIT\nread, the bio is completed and the function returns immediately. In this\ncase the existing r1_bio is leaked.\n\nThis fixes a leak of pre-allocated r1_bio structures for retried reads."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:14:37.742Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/d1eda529a4bf6b866d02755723ee0eb1f037a5ed"
        },
        {
          "url": "https://git.kernel.org/stable/c/c66ed3e6371f5dba8f5d8ab810d6683ddc99201e"
        },
        {
          "url": "https://git.kernel.org/stable/c/db58075bc9c2ad2731f9c063859b47104bc2e7ef"
        },
        {
          "url": "https://git.kernel.org/stable/c/6d92dbd73d19a0622f60352ce9d9379f7a760112"
        },
        {
          "url": "https://git.kernel.org/stable/c/c6e6354295845698d2fdfa20b71fc404786f7e93"
        },
        {
          "url": "https://git.kernel.org/stable/c/69ad6ce47f9bf2b9fe0ed69b042db993d33bbf12"
        }
      ],
      "title": "md/raid1: free r1_bio when REQ_NOWAIT is set and read would block on retry",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-72437",
    "datePublished": "2026-08-15T05:56:50.732Z",
    "dateReserved": "2026-08-09T03:40:39.929Z",
    "dateUpdated": "2026-08-17T05:14:37.742Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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