GHSA-4H8W-644C-QCRW

Vulnerability from github – Published: 2025-12-24 15:30 – Updated: 2025-12-24 15:30
VLAI?
Details

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

ubifs: Fix memleak when insert_old_idx() failed

Following process will cause a memleak for copied up znode:

dirty_cow_znode zn = copy_znode(c, znode); err = insert_old_idx(c, zbr->lnum, zbr->offs); if (unlikely(err)) return ERR_PTR(err); // No one refers to zn.

Fetch a reproducer in [Link].

Function copy_znode() is split into 2 parts: resource allocation and znode replacement, insert_old_idx() is split in similar way, so resource cleanup could be done in error handling path without corrupting metadata(mem & disk). It's okay that old index inserting is put behind of add_idx_dirt(), old index is used in layout_leb_in_gaps(), so the two processes do not depend on each other.

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{
  "affected": [],
  "aliases": [
    "CVE-2023-54050"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-24T13:16:06Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nubifs: Fix memleak when insert_old_idx() failed\n\nFollowing process will cause a memleak for copied up znode:\n\ndirty_cow_znode\n  zn = copy_znode(c, znode);\n  err = insert_old_idx(c, zbr-\u003elnum, zbr-\u003eoffs);\n  if (unlikely(err))\n     return ERR_PTR(err);   // No one refers to zn.\n\nFetch a reproducer in [Link].\n\nFunction copy_znode() is split into 2 parts: resource allocation\nand znode replacement, insert_old_idx() is split in similar way,\nso resource cleanup could be done in error handling path without\ncorrupting metadata(mem \u0026 disk).\nIt\u0027s okay that old index inserting is put behind of add_idx_dirt(),\nold index is used in layout_leb_in_gaps(), so the two processes do\nnot depend on each other.",
  "id": "GHSA-4h8w-644c-qcrw",
  "modified": "2025-12-24T15:30:35Z",
  "published": "2025-12-24T15:30:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-54050"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3ae75f82c33fa1b4ca2006b55c84f4ef4a428d4d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/66e9f2fb3e753f820bec2a98e8c6387029988320"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6f2eee5457bc48b0426dedfd78cdbdea241a6edb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/79079cebbeed624b9d01cfcf1e3254ae1a1f6e14"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a6da0ab9847779e05a7416c7a98148b549de69ef"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b5fda08ef213352ac2df7447611eb4d383cce929"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cc29c7216d7f057eb0613b97dc38c7e1962a88d2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ef9aac603659e9ffe7d69ae16e3f0fc0991a965b"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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