{
  "cveId": "CVE-2025-38627",
  "url": "https://patchblox.com/security/cve/CVE-2025-38627",
  "summary": "CVE-2025-38627 is fixed in linux on 1 platform, first by DEBIAN-CVE-2025-38627, released August 22, 2025. It is not reported as exploited. Patch Radar priority: High.",
  "title": "f2fs: compress: fix UAF of f2fs_inode_info in f2fs_free_dic",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  f2fs: compress: fix UAF of f2fs_inode_info in f2fs_free_dic  The decompress_io_ctx may be released asynchronously after I/O completion. If this file is deleted immediately after read, and the kworker of processing post_read_wq has not been executed yet due to high workloads, It is possible that the inode(f2fs_inode_info) is evicted and freed before it is used f2fs_free_dic.      The UAF case as below:     Thread A                                      Thread B     - f2fs_decompress_end_io      - f2fs_put_dic       - queue_work         add free_dic work to post_read_wq                                                    - do_unlink                                                     - iput                                                      - evict                                                       - call_rcu     This file is deleted after read.      Thread C                                 kworker to process post_read_wq     - rcu_do_batch      - f2fs_free_inode       - kmem_cache_free      inode is freed by rcu                                              - process_scheduled_works                                               - f2fs_late_free_dic                                                - f2fs_free_dic                                                 - f2fs_release_decomp_mem                                       read (dic-\u003Einode)-\u003Ei_compress_algorithm  This patch store compress_algorithm and sbi in dic to avoid inode UAF.  In addition, the previous solution is deprecated in [1] may cause system hang. [1] https://lore.kernel.org/all/c36ab955-c8db-4a8b-a9d0-f07b5f426c3f@kernel.org",
  "published": "2025-08-22T16:15:36Z",
  "severity": "Moderate",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00176,
  "epssPercentile": 0.07129,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-38627",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.1.176-1",
      "fix": "DEBIAN-CVE-2025-38627",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2025-38627",
      "released": "2025-08-22T16:15:36Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.85-1",
      "fix": "DEBIAN-CVE-2025-38627",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2025-38627",
      "released": "2025-08-22T16:15:36Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.16.3-1",
      "fix": "DEBIAN-CVE-2025-38627",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2025-38627",
      "released": "2025-08-22T16:15:36Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}