GHSA-WF2J-C3Q8-8C84

Vulnerability from github – Published: 2025-12-09 03:31 – Updated: 2026-08-04 12:34
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

nilfs2: fix use-after-free bug of nilfs_root in nilfs_evict_inode()

During unmount process of nilfs2, nothing holds nilfs_root structure after nilfs2 detaches its writer in nilfs_detach_log_writer(). However, since nilfs_evict_inode() uses nilfs_root for some cleanup operations, it may cause use-after-free read if inodes are left in "garbage_list" and released by nilfs_dispose_list() at the end of nilfs_detach_log_writer().

Fix this issue by modifying nilfs_evict_inode() to only clear inode without additional metadata changes that use nilfs_root if the file system is degraded to read-only or the writer is detached.

Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2023-53804"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-09T01:16:52Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: fix use-after-free bug of nilfs_root in nilfs_evict_inode()\n\nDuring unmount process of nilfs2, nothing holds nilfs_root structure after\nnilfs2 detaches its writer in nilfs_detach_log_writer().  However, since\nnilfs_evict_inode() uses nilfs_root for some cleanup operations, it may\ncause use-after-free read if inodes are left in \"garbage_list\" and\nreleased by nilfs_dispose_list() at the end of nilfs_detach_log_writer().\n\nFix this issue by modifying nilfs_evict_inode() to only clear inode\nwithout additional metadata changes that use nilfs_root if the file system\nis degraded to read-only or the writer is detached.",
  "id": "GHSA-wf2j-c3q8-8c84",
  "modified": "2026-08-04T12:34:39Z",
  "published": "2025-12-09T03:31:11Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53804"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/116d53f09ff52e6f98e3fe1f85d8898d6ba26c68"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2a782ea8ebd712a458466e3103e2881b4f886cb5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6b4205ea97901f822004e6c8d59484ccfda03faa"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9b5a04ac3ad9898c4745cba46ea26de74ba56a8e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/acc2a40e428f12780004e1e9fce4722d88f909fd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b8427b8522d9ede53015ba45a9978ba68d1162f5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f31e18131ee2ce80a4da5c808221d25b1ae9ad6d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fb8e8d58f116d069e5939e1f786ac84e7fa4533e"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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