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        "name": "Kernel"
      },
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  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72478.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: add bounds check to run_get_highest_vcn()\n\nrun_get_highest_vcn() parses a packed NTFS mapping-pairs buffer without\nany length bound, relying solely on a 0x00 terminator to stop.  A\ncrafted $LogFile UpdateMappingPairs record whose embedded attribute\ncontains mapping-pairs runs without a terminator causes the function to\nread past the slab allocation, triggering a KASAN slab-out-of-bounds\nread on mount.\n\nThe sibling function run_unpack() received an analogous bounds-check in\ncommit b62567bca474 (\"ntfs3: add buffer boundary checks to run_unpack()\"),\nbut run_get_highest_vcn() was missed.\n\nTake a run_buf_size parameter and reject any run header whose payload\nwould extend past the buffer end, mirroring the pattern used by\nrun_unpack().  The caller in fslog.c passes the remaining attribute\nbytes after the mapping-pairs offset.\n\nKASAN report (on mainline v7.1 merge window HEAD):\n\n  BUG: KASAN: slab-out-of-bounds in run_get_highest_vcn+0x3c0/0x410\n  Read of size 1 at addr ffff88800e2d5400 by task mount/72\n  Call Trace:\n   run_get_highest_vcn+0x3c0/0x410\n   do_action.isra.0+0x3ba8/0x7b50\n   log_replay+0x9ddd/0x10200\n   ntfs_loadlog_and_replay+0x4ad/0x610\n   ntfs_fill_super+0x214a/0x4540",
  "id": "CVE-2026-72478",
  "modified": "2026-08-18T03:30:58.599000477Z",
  "published": "2026-08-15T05:57:17.679Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/41081202eb823f5b27ff164b12010b24428100ad"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8afc24a884aff6a6f08028bd779ee65c40054455"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a31893206588374d7d16fad387189d8165c7efd3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bb11485a87fbb2254b62cfed630b699d50e57da8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c23083b472a720c3f60b147db05b25b751c7c1bf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c69b9003332917b652175d5fa9d84158c5ed8617"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72478.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72478"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "fs/ntfs3: add bounds check to run_get_highest_vcn()"
}