{
  "slug": "fs-verity",
  "term": "fs-verity",
  "aliases": [],
  "definition": "fs-verity is a Linux filesystem facility that verifies the immutable contents of selected files against a cryptographic file digest.",
  "note": "Its digest binds a descriptor including file size, not only the Merkle root. Authentication policy is separate from enabling verification. [fs-verity-source]",
  "status": "shipping",
  "advantages": [],
  "limitations": [
    {
      "text": "Names, ownership and mode are outside its measurement; requiring signatures for verity files does not require every file to use verity.",
      "citationIds": [
        "fs-verity-source"
      ]
    }
  ],
  "related": [
    "merkle-tree",
    "dm-verity",
    "dm-integrity"
  ],
  "supersedes": [],
  "supersededBy": [],
  "firstSeen": null,
  "lastSeen": null,
  "citations": [
    {
      "id": "fs-verity-source",
      "title": "Linux v6.12 documentation: fs-verity, descriptor, metadata exclusions and built-in signature limits",
      "url": "https://docs.kernel.org/6.12/filesystems/fsverity.html",
      "accessed": "2026-10-15"
    },
    {
      "id": "hesela-integrity",
      "title": "Hesela: Why a valid checksum can still return the wrong data",
      "url": "https://hesela.com/analyses/checksums-identity-and-lost-writes/#linux-verity",
      "accessed": "2026-10-15"
    }
  ],
  "updated": "2026-10-15"
}