{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-41019",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2024-41019"
  ],
  "published": "2024-07-29T06:37:18Z",
  "summary": "fs/ntfs3: Validate ff offset",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: Validate ff offset\n\nThis adds sanity checks for ff offset. There is a check\non rt->first_free at first, but walking through by ff\nwithout any check. If the second ff is a large offset.\nWe may encounter an out-of-bound read.",
  "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-2024-41019"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/35652dfa8cc9a8a900ec0f1e0395781f94ffc5f0"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/818a257428644b8873e79c44404d8fb6598d4440"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/6ae7265a7b816879fd0203e83b5030d3720bbb7a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/82c94e6a7bd116724738aa67eba6f5fedf3a3319"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/617cf144c206f98978ec730b17159344fd147cb4"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/50c47879650b4c97836a0086632b3a2e300b0f06"
    }
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  "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 vulnerable code is reached only through `mount()` of a crafted NTFS volume, whose `$LogFile` is parsed by `log_replay()` during `ntfs_fill_super()`. No network or remote peer is involved, and the image can be supplied as a local file/loop device rather than requiring physical media, so Local is the correct (and higher-severity) vector versus Physical.\nAC:L - Every field driving the bug (`rt->size`, `rt->used`, `rt->first_free`, `rt->last_free`, and the free-list words) is attacker-authored data in the image, so the out-of-bounds offset is chosen deterministically with no race, memory-layout guess, or environmental precondition.\nPR:L - ntfs3 is `FS_REQUIRES_DEV` without `FS_USERNS_MOUNT`, so mounting is not reachable from an unprivileged user namespace, but on desktop/kiosk/workstation deployments an ordinary logged-in local user can get an attacker-supplied NTFS volume mounted via udisks2/automount policy without any administrative credential.\nUI:N - The attacker performs the mount themselves (or automount/udisks2 does it the moment the device appears) and log replay runs unconditionally on every mount, read-only included; no separate victim has to open a file or take any action.\nS:U - The out-of-bounds accesses occur in kernel memory within the same security authority that already owns the mount; no hypervisor, IOMMU, or sandbox boundary is crossed.\nC:H - The unvalidated free-list walk performs 4-byte reads at attacker-chosen offsets of up to ~4 GB beyond the slab object, and the walk's outcome (terminate, hit `RESTART_ENTRY_ALLOCATED`, or spin) is observable through mount success/failure, turning the wild reads into a probing oracle over kernel heap contents.\nI:H - Because `check_rstbl()` is the sole validator of `first_free`/`last_free` before the tables reach `free_rsttbl_idx()`, `alloc_rsttbl_idx()`, and `extend_rsttbl()`, a corrupted list yields out-of-bounds 4-byte slab writes with attacker-influenced values (`*(__le32 *)Add2Ptr(rt, lf) = off_le`, `*last_e = *e`), which is heap corruption usable for control-flow-relevant metadata overwrite.\nA:H - A wild read up to 4 GB from the buffer readily faults on unmapped kernel memory, producing an oops/panic, and a cyclic free list makes the unbounded `for (off = ff; off;)` / `for (;;)` walks loop forever with no reschedule, hanging the mounting task and CPU."
    }
  }
}