{
  "cveId": "CVE-2025-40150",
  "url": "https://patchblox.com/security/cve/CVE-2025-40150",
  "summary": "CVE-2025-40150 is fixed in linux on 1 platform, first by DEBIAN-CVE-2025-40150, released November 12, 2025. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  f2fs: fix to avoid migrating empty section  It r...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  f2fs: fix to avoid migrating empty section  It reports a bug from device w/ zufs:  F2FS-fs (dm-64): Inconsistent segment (173822) type [1, 0] in SSA and SIT F2FS-fs (dm-64): Stopped filesystem due to reason: 4  Thread A\t\t\t\tThread B - f2fs_expand_inode_data  - f2fs_allocate_pinning_section   - f2fs_gc_range    - do_garbage_collect w/ segno #x \t\t\t\t\t- writepage \t\t\t\t\t - f2fs_allocate_data_block \t\t\t\t\t  - new_curseg \t\t\t\t\t   - allocate segno #x  The root cause is: fallocate on pinning file may race w/ block allocation as above, result in do_garbage_collect() from fallocate() may migrate segment which is just allocated by a log, the log will update segment type in its in-memory structure, however GC will get segment type from on-disk SSA block, once segment type changes by log, we can detect such inconsistency, then shutdown filesystem.  In this case, on-disk SSA shows type of segno #173822 is 1 (SUM_TYPE_NODE), however segno #173822 was just allocated as data type segment, so in-memory SIT shows type of segno #173822 is 0 (SUM_TYPE_DATA).  Change as below to fix this issue: - check whether current section is empty before gc - add sanity checks on do_garbage_collect() to avoid any race case, result in migrating segment used by log. - btw, it fixes misc issue in printed logs: \u0022SSA and SIT\u0022 -\u003E \u0022SIT and SSA\u0022.",
  "published": "2025-11-12T11:15:44Z",
  "severity": "",
  "epss": 0.00264,
  "epssPercentile": 0.18394,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.85-1",
      "fix": "DEBIAN-CVE-2025-40150",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2025-40150",
      "released": "2025-11-12T11:15:44Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.17.6-1",
      "fix": "DEBIAN-CVE-2025-40150",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2025-40150",
      "released": "2025-11-12T11:15:44Z"
    }
  ],
  "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"
  }
}