GHSA-24C6-4VCC-GQ5V

Vulnerability from github – Published: 2025-09-22 21:30 – Updated: 2025-11-03 18:31
VLAI?
Details

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

ocfs2: prevent release journal inode after journal shutdown

Before calling ocfs2_delete_osb(), ocfs2_journal_shutdown() has already been executed in ocfs2_dismount_volume(), so osb->journal must be NULL. Therefore, the following calltrace will inevitably fail when it reaches jbd2_journal_release_jbd_inode().

ocfs2_dismount_volume()-> ocfs2_delete_osb()-> ocfs2_free_slot_info()-> __ocfs2_free_slot_info()-> evict()-> ocfs2_evict_inode()-> ocfs2_clear_inode()-> jbd2_journal_release_jbd_inode(osb->journal->j_journal,

Adding osb->journal checks will prevent null-ptr-deref during the above execution path.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-39842"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-09-19T16:15:42Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: prevent release journal inode after journal shutdown\n\nBefore calling ocfs2_delete_osb(), ocfs2_journal_shutdown() has already\nbeen executed in ocfs2_dismount_volume(), so osb-\u003ejournal must be NULL. \nTherefore, the following calltrace will inevitably fail when it reaches\njbd2_journal_release_jbd_inode().\n\nocfs2_dismount_volume()-\u003e\n  ocfs2_delete_osb()-\u003e\n    ocfs2_free_slot_info()-\u003e\n      __ocfs2_free_slot_info()-\u003e\n        evict()-\u003e\n          ocfs2_evict_inode()-\u003e\n            ocfs2_clear_inode()-\u003e\n\t      jbd2_journal_release_jbd_inode(osb-\u003ejournal-\u003ej_journal,\n\nAdding osb-\u003ejournal checks will prevent null-ptr-deref during the above\nexecution path.",
  "id": "GHSA-24c6-4vcc-gq5v",
  "modified": "2025-11-03T18:31:41Z",
  "published": "2025-09-22T21:30:17Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-39842"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/42c415c53ad2065088cc411d08925effa5b3d255"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/85e66331b60601d903cceaf8c10a234db863cd78"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e9188f66e94955431ddbe2cd1cdf8ff2bb486abf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f46e8ef8bb7b452584f2e75337b619ac51a7cadf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f4a917e6cd6c798f7adf39907f117fc754db1283"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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