{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-42299",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2024-42299"
  ],
  "published": "2024-08-17T09:11:20Z",
  "summary": "fs/ntfs3: Update log->page_{mask,bits} if log->page_size changed",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: Update log->page_{mask,bits} if log->page_size changed\n\nIf an NTFS file system is mounted to another system with different\nPAGE_SIZE from the original system, log->page_size will change in\nlog_replay(), but log->page_{mask,bits} don't change correspondingly.\nThis will cause a panic because \"u32 bytes = log->page_size - page_off\"\nwill get a negative value in the later read_log_page().",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
    }
  ],
  "affected": [
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        "1:6.6.20-1+rpt1",
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  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-42299"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/0484adcb5fbcadd9ba0fd4485c42630f72e97da9"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b90ceffdc975502bc085ce8e79c6adeff05f9521"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2cac0df3324b5e287d8020bc0708f7d2dec88a6f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/0a4ae2644e2a3b3b219aad9639fb2b0691d08420"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2fef55d8f78383c8e6d6d4c014b9597375132696"
    }
  ],
  "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 corruption is triggered during ntfs3 mount-time journal replay of an attacker-supplied NTFS image, delivered via removable media, a loop device, or an image file \u2014 there is no network path to `log_replay()`.\nAC:L - Triggering is fully deterministic with no race: the attacker simply sets `sys_page_size`/`page_size` in the $LogFile restart header to a value differing from the host `PAGE_SIZE`, and the stale `page_mask`/`page_bits`/`one_page_buf` mismatch corrupts memory on every mount.\nPR:L - NTFS volumes on removable media are routinely auto-mounted by desktop/kiosk automounters (udisks2) with the in-kernel ntfs3 driver, so an unprivileged local user who supplies the media or image reaches the vulnerable replay path without administrator action.\nUI:N - Automount performs the mount and journal replay automatically when the media is attached; no victim action such as opening a file is required for the overflow to occur.\nS:U - The heap overflow and out-of-bounds reads are confined to kernel memory within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - With a stale mask larger than the new page size, `bytes = log->page_size - page_off` underflows and `memcpy()` reads up to ~4 GiB past `one_page_buf` into the caller's buffer, and the mismatched `page_off`/`bytes` also expose adjacent slab contents to the log parser \u2014 an unbounded kernel heap disclosure.\nI:H - When the on-disk page size exceeds the host's, `ntfs_read_run_nb()` writes `log->page_size` bytes (e.g. 64 KiB) of fully attacker-controlled disk data into the 4 KiB `one_page_buf`, a controlled-length, controlled-content linear heap overflow usable for object corruption and control-flow hijack.\nA:H - The commit message documents an outright kernel panic from the negative-length read, and a ~60 KiB slab overwrite or ~4 GiB wild memcpy reliably oopses the machine at mount time."
    }
  }
}