{
  "cveId": "CVE-2021-47007",
  "url": "https://patchblox.com/security/cve/CVE-2021-47007",
  "summary": "CVE-2021-47007 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47007, released February 28, 2024. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  f2fs: fix panic during f2fs_resize_fs()  f2fs_re...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  f2fs: fix panic during f2fs_resize_fs()  f2fs_resize_fs() hangs in below callstack with testcase: - mkfs 16GB image \u0026 mount image - dd 8GB fileA - dd 8GB fileB - sync - rm fileA - sync - resize filesystem to 8GB  kernel BUG at segment.c:2484! Call Trace:  allocate_segment_by_default\u002B0x92/0xf0 [f2fs]  f2fs_allocate_data_block\u002B0x44b/0x7e0 [f2fs]  do_write_page\u002B0x5a/0x110 [f2fs]  f2fs_outplace_write_data\u002B0x55/0x100 [f2fs]  f2fs_do_write_data_page\u002B0x392/0x850 [f2fs]  move_data_page\u002B0x233/0x320 [f2fs]  do_garbage_collect\u002B0x14d9/0x1660 [f2fs]  free_segment_range\u002B0x1f7/0x310 [f2fs]  f2fs_resize_fs\u002B0x118/0x330 [f2fs]  __f2fs_ioctl\u002B0x487/0x3680 [f2fs]  __x64_sys_ioctl\u002B0x8e/0xd0  do_syscall_64\u002B0x33/0x80  entry_SYSCALL_64_after_hwframe\u002B0x44/0xa9  The root cause is we forgot to check that whether we have enough space in resized filesystem to store all valid blocks in before-resizing filesystem, then allocator will run out-of-space during block migration in free_segment_range().",
  "published": "2024-02-28T09:15:38Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00236,
  "epssPercentile": 0.14602,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.10.38-1",
      "fix": "DEBIAN-CVE-2021-47007",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47007",
      "released": "2024-02-28T09:15:38Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.10.38-1",
      "fix": "DEBIAN-CVE-2021-47007",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47007",
      "released": "2024-02-28T09:15:38Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.10.38-1",
      "fix": "DEBIAN-CVE-2021-47007",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47007",
      "released": "2024-02-28T09:15:38Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}