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GHSA-XWJC-Q49F-3X92

Vulnerability from github – Published: 2026-08-15 06:32 – Updated: 2026-08-15 06:32
VLAI
Details

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

ocfs2: add journal NULL check in ocfs2_checkpoint_inode()

During unmount, ocfs2_journal_shutdown() frees the journal and sets osb->journal to NULL. Later, when VFS evicts remaining cached inodes, ocfs2_evict_inode() -> ocfs2_clear_inode() -> ocfs2_checkpoint_inode() -> ocfs2_ci_fully_checkpointed() dereferences osb->journal, causing a NULL pointer dereference.

Fix this by adding a NULL check for osb->journal in ocfs2_checkpoint_inode(). If the journal is NULL, it has already been fully flushed and destroyed during shutdown, so there is nothing to checkpoint.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-72161"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T06:21:33Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: add journal NULL check in ocfs2_checkpoint_inode()\n\nDuring unmount, ocfs2_journal_shutdown() frees the journal and sets\nosb-\u003ejournal to NULL. Later, when VFS evicts remaining cached inodes,\nocfs2_evict_inode() -\u003e ocfs2_clear_inode() -\u003e ocfs2_checkpoint_inode()\n-\u003e ocfs2_ci_fully_checkpointed() dereferences osb-\u003ejournal, causing a\nNULL pointer dereference.\n\nFix this by adding a NULL check for osb-\u003ejournal in\nocfs2_checkpoint_inode(). If the journal is NULL, it has already been\nfully flushed and destroyed during shutdown, so there is nothing to\ncheckpoint.",
  "id": "GHSA-xwjc-q49f-3x92",
  "modified": "2026-08-15T06:32:14Z",
  "published": "2026-08-15T06:32:14Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72161"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/24daf13422e8328fd588c34a017bdef1949910e8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/499714de42ab4d2e778cbb10186684142a1222eb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/63921f790234b221e4b15c56c72888b13250f81d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7da7e4ac21895fe34cceffcfc99497cc2750da99"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a291c77c034b7a81849ce9b71cc9ecda9e587d89"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/eb6a13834c23e291f1170cb1b489ec255edfa5a3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}



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