ocfs2: reject dinodes with non-canonical i_mode type

{
  "id": "c72fc4c6f449eb29bc0029353afe07995777ce60030b35913563d0d09f1d0a54",
  "url": "https://osv.dev/vulnerability/CVE-2026-72160",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ocfs2: reject dinodes with non-canonical i_mode type",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: ocfs2: reject dinodes with non-canonical i_mode type Patch series \"ocfs2: harden inode validators against forged metadata\", v2. This series adds three structural checks to OCFS2 dinode validation so malformed on-disk fields are rejected before ocfs2_populate_inode() copies them into the in-core inode. The checks cover: - i_mode values whose type bits do not name a canonical POSIX file type; - non-device dinodes whose id1.dev1.i_rdev field is non-zero; and - non-inline dinodes that claim non-zero i_size while i_clusters is zero, covering directories unconditionally and regular files on non-sparse volumes. The normal read path reports these through ocfs2_error(), matching the existing suballoc-slot, inline-data, chain-list, and refcount checks. The online filecheck path uses the same structural predicates but keeps its own reporting contract, returning OCFS2_FILECHECK_ERR_INVALIDINO instead of calling ocfs2_error(). This patch (of 3): ocfs2_validate_inode_block() currently accepts any non-zero i_mode value. ocfs2_populate_inode() then copies that mode verbatim into inode->i_mode and dispatches on i_mode & S_IFMT to the file/dir/symlink/special_file iops; an unrecognised type falls through to ocfs2_special_file_iops and init_special_inode(). Reject dinodes whose type bits do not name one of the seven canonical POSIX file types. Use fs_umode_to_ftype(), the same generic file-type conversion helper OCFS2 already u",
    "evidence": "osv:CVE-2026-72160",
    "products": [
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          "value": "Kernel",
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    "severity": "high",
    "structured": {
      "id": "CVE-2026-72160",
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      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
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      "modified": "2026-10-28T02:30:49.279969007Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/157d31ef45038d89cd19620105e082d43c8e41e0",
        "https://git.kernel.org/stable/c/2e3aac33988ef4e4170141db8e995693ea38357c",
        "https://git.kernel.org/stable/c/4db3b6a2a8ecf2a89d26a4090ace4072c6fad050",
        "https://git.kernel.org/stable/c/5366a017099c6a3c443be908a05f26fd72af12a1",
        "https://git.kernel.org/stable/c/82afe13558354390d8a592a5334d5f4fd72c0e5c",
        "https://git.kernel.org/stable/c/a5b555bcabbb0aff8745ad181768eaf9d964c1ee",
        "https://git.kernel.org/stable/c/b858f2d57cfc9d57ce61b86051d603dc0ebccd40",
        "https://git.kernel.org/stable/c/fb024ea29f6cb1f01745e5f2e31646f3acb9aa6f",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72160.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-72160",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72160.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-72160",
        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 517667,
  "published_at": "2026-08-15T05:53:28.943+00:00"
}