ghsa-x952-wmpf-82wc
Vulnerability from github
Published
2025-09-07 18:31
Modified
2025-09-07 18:31
Details

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

mm: swap: fix potential buffer overflow in setup_clusters()

In setup_swap_map(), we only ensure badpages are in range (0, last_page]. As maxpages might be < last_page, setup_clusters() will encounter a buffer overflow when a badpage is >= maxpages.

Only call inc_cluster_info_page() for badpage which is < maxpages to fix the issue.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-39727"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-09-07T16:15:46Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm: swap: fix potential buffer overflow in setup_clusters()\n\nIn setup_swap_map(), we only ensure badpages are in range (0, last_page]. \nAs maxpages might be \u003c last_page, setup_clusters() will encounter a buffer\noverflow when a badpage is \u003e= maxpages.\n\nOnly call inc_cluster_info_page() for badpage which is \u003c maxpages to fix\nthe issue.",
  "id": "GHSA-x952-wmpf-82wc",
  "modified": "2025-09-07T18:31:26Z",
  "published": "2025-09-07T18:31:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-39727"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/152c1339dc13ad46f1b136e8693de15980750835"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/815c528b13f2bb9b3130c13bedeabf2351a68129"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/91b370800b3f2b3dda244c0ab06719c4971190a5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9b01ada580ee84fb319e7ecb5fb5b1f54a9eb799"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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