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GHSA-JGM3-V9G7-RFC3

Vulnerability from github – Published: 2025-05-01 15:31 – Updated: 2025-11-12 18:31
VLAI
Details

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

btrfs: fix inode list leak during backref walking at resolve_indirect_refs()

During backref walking, at resolve_indirect_refs(), if we get an error we jump to the 'out' label and call ulist_free() on the 'parents' ulist, which frees all the elements in the ulist - however that does not free any inode lists that may be attached to elements, through the 'aux' field of a ulist node, so we end up leaking lists if we have any attached to the unodes.

Fix this by calling free_leaf_list() instead of ulist_free() when we exit from resolve_indirect_refs(). The static function free_leaf_list() is moved up for this to be possible and it's slightly simplified by removing unnecessary code.

Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2022-49914"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-401"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-05-01T15:16:16Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix inode list leak during backref walking at resolve_indirect_refs()\n\nDuring backref walking, at resolve_indirect_refs(), if we get an error\nwe jump to the \u0027out\u0027 label and call ulist_free() on the \u0027parents\u0027 ulist,\nwhich frees all the elements in the ulist - however that does not free\nany inode lists that may be attached to elements, through the \u0027aux\u0027 field\nof a ulist node, so we end up leaking lists if we have any attached to\nthe unodes.\n\nFix this by calling free_leaf_list() instead of ulist_free() when we exit\nfrom resolve_indirect_refs(). The static function free_leaf_list() is\nmoved up for this to be possible and it\u0027s slightly simplified by removing\nunnecessary code.",
  "id": "GHSA-jgm3-v9g7-rfc3",
  "modified": "2025-11-12T18:31:03Z",
  "published": "2025-05-01T15:31:52Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49914"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2c0329406bb28109c07c6e23e5e3e0fa618a95d7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/396515db923ad5cbeb179d6b88927870b4cbebb7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5614dc3a47e3310fbc77ea3b67eaadd1c6417bf1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6ba3479f9e96b9ad460c7e77abc26dd16e5dec4f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a52e24c7fcc3c5ce3588a14e3663c00868d36623"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b1dc9019bb5f89abae85645de1a2dd4830c1f8e9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cded2c89774b99b67c98147ae103ea878c92a206"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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