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CVE-2025-40179

Estado: AplazadaSin puntuar—

In the Linux kernel, the following vulnerability has been resolved:

ext4: verify orphan file size is not too big

In principle orphan file can be arbitrarily large. However orphan replay needs to traverse it all and we also pin all its buffers in memory. Thus filesystems with absurdly large orphan files can lead to big amounts of memory consumed. Limit orphan file size to a sane value and also use kvmalloc() for allocating array of block descriptor structures to avoid large order allocations for sane but large orphan files.

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

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{
  "id": "CVE-2025-40179",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "02f310fcf47fa9311d6ba2946a8d19e7d7d11f37",
              "lessThan": "95a21611b14ae0a401720645245a8db16f040995",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "02f310fcf47fa9311d6ba2946a8d19e7d7d11f37",
              "lessThan": "566a1d6084563bd07433025aa23bcea4427de107",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "02f310fcf47fa9311d6ba2946a8d19e7d7d11f37",
              "lessThan": "304fc34ff6fc8261138fd81f119e024ac3a129e9",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "02f310fcf47fa9311d6ba2946a8d19e7d7d11f37",
              "lessThan": "a2d803fab8a6c6a874277cb80156dc114db91921",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "02f310fcf47fa9311d6ba2946a8d19e7d7d11f37",
              "lessThan": "2b9da798ff0f4d026c5f0f815047393ebe7d8859",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "02f310fcf47fa9311d6ba2946a8d19e7d7d11f37",
              "lessThan": "0a6ce20c156442a4ce2a404747bb0fb05d54eeb3",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "fs/ext4/orphan.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.15"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "5.15",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.15.195",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.157",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.113",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.54",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.17.4",
              "versionType": "semver",
              "lessThanOrEqual": "6.17.*"
            },
            {
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "fs/ext4/orphan.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-11-12T22:15:44.613",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/0a6ce20c156442a4ce2a404747bb0fb05d54eeb3",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/2b9da798ff0f4d026c5f0f815047393ebe7d8859",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/304fc34ff6fc8261138fd81f119e024ac3a129e9",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/566a1d6084563bd07433025aa23bcea4427de107",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/95a21611b14ae0a401720645245a8db16f040995",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/a2d803fab8a6c6a874277cb80156dc114db91921",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Deferred",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: verify orphan file size is not too big\n\nIn principle orphan file can be arbitrarily large. However orphan replay\nneeds to traverse it all and we also pin all its buffers in memory. Thus\nfilesystems with absurdly large orphan files can lead to big amounts of\nmemory consumed. Limit orphan file size to a sane value and also use\nkvmalloc() for allocating array of block descriptor structures to avoid\nlarge order allocations for sane but large orphan files."
    }
  ],
  "lastModified": "2026-06-17T09:21:24.727",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}