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CVE-2026-72159

Estado: RecibidaSin puntuar—

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

ocfs2: reject non-inline dinodes with i_size and zero i_clusters

On a volume mounted without OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC, a non-inline regular file with non-zero i_size and zero i_clusters is structurally malformed: the extent map declares no allocated clusters yet the size header claims content exists. Keep rejecting that shape, but express it through a shared predicate so the same invariant is available to normal inode reads and online filecheck.

The same zero-cluster shape is also malformed for non-inline directories. ocfs2 directory growth allocates backing storage before advancing i_size, and ocfs2_dir_foreach_blk_el() later walks until ctx->pos reaches i_size_read(inode).

Leer descripción completaMostrar menos

A forged directory dinode with a huge i_size and no clusters would repeatedly fail on holes while advancing through the claimed size.

Sparse regular files remain exempt: on sparse-alloc volumes, truncate can legitimately grow i_size without allocating clusters. System inodes and inline-data dinodes also retain their separate storage rules.

Mirror the check in ocfs2_filecheck_validate_inode_block() as well. filecheck reports through its own error namespace, so malformed size/cluster state is logged as a filecheck invalid-inode result rather than via ocfs2_error(), but it must not proceed into ocfs2_populate_inode().

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-2026-72159",
  "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": "b657c95c11088d77fc1bfc9c84d940f778bf9d12",
              "lessThan": "416d3e5f8a30ed04fe21ba7dc73c2841c3b56265",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "b657c95c11088d77fc1bfc9c84d940f778bf9d12",
              "lessThan": "ed0f938f946f16b772e99cb8c277ab57828e5be4",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "b657c95c11088d77fc1bfc9c84d940f778bf9d12",
              "lessThan": "83f6756a7b71adec0a41ae68e079a38906d59c6c",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "b657c95c11088d77fc1bfc9c84d940f778bf9d12",
              "lessThan": "38c1ef7ce50eb4af0f89038b8aba12396ddb9233",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "b657c95c11088d77fc1bfc9c84d940f778bf9d12",
              "lessThan": "d837068eefbc2651fe5789bf75a0f945710f7b8e",
              "versionType": "git"
            },
            {
              "status": "affected",
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              "lessThan": "2174c68f623b74bd8690a4a6a4a52882d8ac3dc3",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "b657c95c11088d77fc1bfc9c84d940f778bf9d12",
              "lessThan": "3bfeb436d4be6a2beb56cab344770e93e6b07260",
              "versionType": "git"
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              "lessThan": "7ebc672fab7a76e1e47e0f2fc1ee48118d27fde4",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "fs/ocfs2/inode.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.29"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "2.6.29",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "fs/ocfs2/inode.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-15T06:21:33.720",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/2174c68f623b74bd8690a4a6a4a52882d8ac3dc3",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/38c1ef7ce50eb4af0f89038b8aba12396ddb9233",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/3bfeb436d4be6a2beb56cab344770e93e6b07260",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/416d3e5f8a30ed04fe21ba7dc73c2841c3b56265",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/7ebc672fab7a76e1e47e0f2fc1ee48118d27fde4",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/83f6756a7b71adec0a41ae68e079a38906d59c6c",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d837068eefbc2651fe5789bf75a0f945710f7b8e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ed0f938f946f16b772e99cb8c277ab57828e5be4",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: reject non-inline dinodes with i_size and zero i_clusters\n\nOn a volume mounted without OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC, a\nnon-inline regular file with non-zero i_size and zero i_clusters is\nstructurally malformed: the extent map declares no allocated clusters yet\nthe size header claims content exists.  Keep rejecting that shape, but\nexpress it through a shared predicate so the same invariant is available\nto normal inode reads and online filecheck.\n\nThe same zero-cluster shape is also malformed for non-inline directories. \nocfs2 directory growth allocates backing storage before advancing i_size,\nand ocfs2_dir_foreach_blk_el() later walks until ctx->pos reaches\ni_size_read(inode).  A forged directory dinode with a huge i_size and no\nclusters would repeatedly fail on holes while advancing through the\nclaimed size.\n\nSparse regular files remain exempt: on sparse-alloc volumes, truncate can\nlegitimately grow i_size without allocating clusters.  System inodes and\ninline-data dinodes also retain their separate storage rules.\n\nMirror the check in ocfs2_filecheck_validate_inode_block() as well. \nfilecheck reports through its own error namespace, so malformed\nsize/cluster state is logged as a filecheck invalid-inode result rather\nthan via ocfs2_error(), but it must not proceed into\nocfs2_populate_inode()."
    }
  ],
  "lastModified": "2026-08-17T06:18:16.133",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}