{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-38623",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2024-38623"
  ],
  "published": "2024-06-21T10:24:08Z",
  "summary": "fs/ntfs3: Use variable length array instead of fixed size",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: Use variable length array instead of fixed size\n\nShould fix smatch warning:\n\tntfs_set_label() error: __builtin_memcpy() 'uni->name' too small (20 vs 256)",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
    }
  ],
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-38623"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/a2de301d90b782ac5d7a5fe32995caaee9ab3a0f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/3839a9b19a4b70eff6b6ad70446f639f7fd5a3d7"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1fe1c9dc21ee52920629d2d9b9bd84358931a8d1"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/cceef44b34819c24bb6ed70dce5b524bd3e368d1"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1997cdc3e727526aa5d84b32f7cbb3f56459b7ef"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T11:52:36Z",
    "severity": {
      "source": "kernel CNA",
      "cvss_v3_score": 7.8,
      "cvss_v3_severity": "High",
      "scenario": "AV:L - The affected code is the ntfs3 local filesystem name/label handling, reached through ordinary VFS syscalls (open/creat/link/rename/lookup) on a mounted volume or a write to /proc/fs/ntfs3/<dev>/label. No network protocol handling is involved.\nAC:L - Triggering is fully deterministic \u2014 the attacker simply supplies a name or label longer than 10 UTF-16 units, and the copy length is directly attacker-controlled. There is no race, no memory-layout dependency, and no condition outside the attacker's control.\nPR:L - While the ntfs_set_label() path is root-gated, the identical mis-sized cpu_str accesses in fill_name_de(), ntfs_lookup(), ntfs_d_hash() and ntfs_d_compare() are reached by any unprivileged user creating, renaming, linking or merely looking up a long file name on an already-mounted ntfs3 volume.\nUI:N - No victim action is required once an ntfs3 volume is mounted, which is the normal state on desktops, kiosks, Android and media devices with USB/NTFS storage; the attacker acts entirely on their own.\nS:U - The corruption stays within kernel memory under the same security authority; there is no VM, IOMMU or sandbox boundary crossed.\nC:H - Up to 256 bytes (label path) and 510 bytes (name path) are read out of a 20-byte-declared array, an out-of-bounds read far beyond a few bounded bytes that can disclose adjacent kernel heap contents into on-disk name/label attributes readable by the attacker.\nI:H - The same paths write up to 510 bytes through the 20-byte-declared name member with attacker-controlled length and content, an out-of-bounds write that is the classic primitive for adjacent-object corruption and control-flow hijack.\nA:H - Out-of-declared-bounds access of this size corrupts or over-reads adjacent kernel heap state and trips CONFIG_FORTIFY_SOURCE field-spanning detection, resulting in kernel warnings, oops or panic (fatal with panic_on_warn)."
    }
  }
}