{
  "slug": "dm-verity",
  "term": "dm-verity",
  "aliases": [],
  "definition": "dm-verity is a Linux device-mapper target that verifies a read-only block mapping against a trusted cryptographic root hash.",
  "note": "Authentication of the root is external to ordinary block checking. Optional FEC repairs are checked against the hashes. [dm-verity-source]",
  "status": "shipping",
  "advantages": [],
  "limitations": [
    {
      "text": "ignore_corruption permits reads after detected corruption; check_at_most_once reduces protection against online changes.",
      "citationIds": [
        "dm-verity-source"
      ]
    }
  ],
  "related": [
    "merkle-tree",
    "fs-verity",
    "dm-integrity"
  ],
  "supersedes": [],
  "supersededBy": [],
  "firstSeen": null,
  "lastSeen": null,
  "citations": [
    {
      "id": "dm-verity-source",
      "title": "Linux v6.12 documentation: dm-verity, parameters, failure policies and hash-tree format",
      "url": "https://docs.kernel.org/6.12/admin-guide/device-mapper/verity.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"
}