ghsa-84gc-cf68-frm5
Vulnerability from github
Published
2025-04-03 09:32
Modified
2025-04-10 18:32
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details

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

mm/huge_memory: drop beyond-EOF folios with the right number of refs

When an after-split folio is large and needs to be dropped due to EOF, folio_put_refs(folio, folio_nr_pages(folio)) should be used to drop all page cache refs. Otherwise, the folio will not be freed, causing memory leak.

This leak would happen on a filesystem with blocksize > page_size and a truncate is performed, where the blocksize makes folios split to >0 order ones, causing truncated folios not being freed.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-22000"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-401"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-04-03T08:15:15Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/huge_memory: drop beyond-EOF folios with the right number of refs\n\nWhen an after-split folio is large and needs to be dropped due to EOF,\nfolio_put_refs(folio, folio_nr_pages(folio)) should be used to drop all\npage cache refs.  Otherwise, the folio will not be freed, causing memory\nleak.\n\nThis leak would happen on a filesystem with blocksize \u003e page_size and a\ntruncate is performed, where the blocksize makes folios split to \u003e0 order\nones, causing truncated folios not being freed.",
  "id": "GHSA-84gc-cf68-frm5",
  "modified": "2025-04-10T18:32:01Z",
  "published": "2025-04-03T09:32:15Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-22000"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/14efb4793519d73fb2902bb0ece319b886e4b4b9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/86368616a9ce51f6b41efa251b6e066893851d67"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/92ad820a1f2d95d5a8d6c2bd3f391bbb068a5f9e"
    }
  ],
  "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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