{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2025-21811",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2025-21811"
  ],
  "published": "2025-02-27T20:00:18Z",
  "summary": "nilfs2: protect access to buffers with no active references",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: protect access to buffers with no active references\n\nnilfs_lookup_dirty_data_buffers(), which iterates through the buffers\nattached to dirty data folios/pages, accesses the attached buffers without\nlocking the folios/pages.\n\nFor data cache, nilfs_clear_folio_dirty() may be called asynchronously\nwhen the file system degenerates to read only, so\nnilfs_lookup_dirty_data_buffers() still has the potential to cause use\nafter free issues when buffers lose the protection of their dirty state\nmidway due to this asynchronous clearing and are unintentionally freed by\ntry_to_free_buffers().\n\nEliminate this race issue by adjusting the lock section in this function.",
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-21811"
    },
    {
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    "upstream_modified": "2026-08-05T12:19:11Z"
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