CVE-2026-90401

{
  "id": "CVE-2026-90401",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-09-17T17:17:39.877",
  "lastModified": "2026-10-19T09:19:34.223",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd: remove REQ_NOWAIT support from raid1/10/456\n\nREQ_NOWAIT support in md personalities that can block internally is\nfundamentally incomplete. While reads can avoid some blocking paths,\nwrite requests can still encounter cases where one mirror succeeds while\nanother returns -EAGAIN. At that point md cannot distinguish queue\npressure from a real device failure, so it can neither record a bad\nblock nor safely retry the write without REQ_NOWAIT, leaving mirrors\nwith divergent data.\n\nRather than continue advertising REQ_NOWAIT support for personalities\nthat cannot implement it correctly, remove it from raid1, raid10 and\nraid456. Keep REQ_NOWAIT for linear and raid0, which only remap bios to\ntheir underlying devices; stacked limits will still clear the feature if\nany component device lacks REQ_NOWAIT support."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "drivers/md/md-bitmap.c",
            "drivers/md/md-bitmap.h",
            "drivers/md/md-linear.c",
            "drivers/md/md-llbitmap.c",
            "drivers/md/md.c",
            "drivers/md/raid0.c",
            "drivers/md/raid1-10.c",
            "drivers/md/raid1.c",
            "drivers/md/raid10.c",
            "drivers/md/raid5.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "f51d46d0e7cb5b8494aa534d276a9d8915a2443d",
              "lessThan": "ffcc9ea4e4d121c78aef6654a1577aa7d120774d",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "f51d46d0e7cb5b8494aa534d276a9d8915a2443d",
              "lessThan": "9bb9504e2d8f3d22ef12d51c333dd499f402dc8f",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "f51d46d0e7cb5b8494aa534d276a9d8915a2443d",
              "lessThan": "3fe5b7c9fb72ccc29bfd0f955b124892af7e3674",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "39db562b3fedb93978a7e42dd216b306740959f8",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "5.15.111",
              "lessThan": "5.16",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "drivers/md/md-bitmap.c",
            "drivers/md/md-bitmap.h",
            "drivers/md/md-linear.c",
            "drivers/md/md-llbitmap.c",
            "drivers/md/md.c",
            "drivers/md/raid0.c",
            "drivers/md/raid1-10.c",
            "drivers/md/raid1.c",
            "drivers/md/raid10.c",
            "drivers/md/raid5.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "5.17",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "5.17",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.57",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2.6",
              "lessThanOrEqual": "7.2.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.3",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H",
          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.2
      }
    ]
  },
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/3fe5b7c9fb72ccc29bfd0f955b124892af7e3674",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/9bb9504e2d8f3d22ef12d51c333dd499f402dc8f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ffcc9ea4e4d121c78aef6654a1577aa7d120774d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}