{
  "cveId": "CVE-2023-53537",
  "url": "https://patchblox.com/security/cve/CVE-2023-53537",
  "summary": "CVE-2023-53537 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-53537, released October 4, 2025. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  f2fs: fix to avoid use-after-free for cached IPU...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  f2fs: fix to avoid use-after-free for cached IPU bio  xfstest generic/019 reports a bug:  kernel BUG at mm/filemap.c:1619! RIP: 0010:folio_end_writeback\u002B0x8a/0x90 Call Trace:  end_page_writeback\u002B0x1c/0x60  f2fs_write_end_io\u002B0x199/0x420  bio_endio\u002B0x104/0x180  submit_bio_noacct\u002B0xa5/0x510  submit_bio\u002B0x48/0x80  f2fs_submit_write_bio\u002B0x35/0x300  f2fs_submit_merged_ipu_write\u002B0x2a0/0x2b0  f2fs_write_single_data_page\u002B0x838/0x8b0  f2fs_write_cache_pages\u002B0x379/0xa30  f2fs_write_data_pages\u002B0x30c/0x340  do_writepages\u002B0xd8/0x1b0  __writeback_single_inode\u002B0x44/0x370  writeback_sb_inodes\u002B0x233/0x4d0  __writeback_inodes_wb\u002B0x56/0xf0  wb_writeback\u002B0x1dd/0x2d0  wb_workfn\u002B0x367/0x4a0  process_one_work\u002B0x21d/0x430  worker_thread\u002B0x4e/0x3c0  kthread\u002B0x103/0x130  ret_from_fork\u002B0x2c/0x50  The root cause is: after cp_error is set, f2fs_submit_merged_ipu_write() in f2fs_write_single_data_page() tries to flush IPU bio in cache, however f2fs_submit_merged_ipu_write() missed to check validity of @bio parameter, result in submitting random cached bio which belong to other IO context, then it will cause use-after-free issue, fix it by adding additional validity check.",
  "published": "2025-10-04T16:15:48Z",
  "severity": "high",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00164,
  "epssPercentile": 0.05595,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.1.37-1",
      "fix": "DEBIAN-CVE-2023-53537",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-53537",
      "released": "2025-10-04T16:15:48Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.3.7-1",
      "fix": "DEBIAN-CVE-2023-53537",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-53537",
      "released": "2025-10-04T16:15:48Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.3.7-1",
      "fix": "DEBIAN-CVE-2023-53537",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-53537",
      "released": "2025-10-04T16:15:48Z"
    }
  ],
  "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"
  }
}