{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/md/dm-verity-fec.c",
            "drivers/md/dm-verity-fec.h",
            "drivers/md/dm-verity-target.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "232948cf600fba69aff36b25d85ef91a73a35756",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "d9f3e47d3fae0c101d9094bc956ed24e7a0ee801",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/md/dm-verity-fec.c",
            "drivers/md/dm-verity-fec.h",
            "drivers/md/dm-verity-target.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19-rc1",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm-verity: disable recursive forward error correction\n\nThere are two problems with the recursive correction:\n\n1. It may cause denial-of-service. In fec_read_bufs, there is a loop that\nhas 253 iterations. For each iteration, we may call verity_hash_for_block\nrecursively. There is a limit of 4 nested recursions - that means that\nthere may be at most 253^4 (4 billion) iterations. Red Hat QE team\nactually created an image that pushes dm-verity to this limit - and this\nimage just makes the udev-worker process get stuck in the \u0027D\u0027 state.\n\n2. It doesn\u0027t work. In fec_read_bufs we store data into the variable\n\"fio-\u003ebufs\", but fio bufs is shared between recursive invocations, if\n\"verity_hash_for_block\" invoked correction recursively, it would\noverwrite partially filled fio-\u003ebufs."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-23T15:23:59.464Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/232948cf600fba69aff36b25d85ef91a73a35756"
        },
        {
          "url": "https://git.kernel.org/stable/c/d9f3e47d3fae0c101d9094bc956ed24e7a0ee801"
        }
      ],
      "title": "dm-verity: disable recursive forward error correction",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-71161",
    "datePublished": "2026-01-23T15:23:59.464Z",
    "dateReserved": "2026-01-13T15:30:19.665Z",
    "dateUpdated": "2026-01-23T15:23:59.464Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-71161\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-01-23T16:15:53.000\",\"lastModified\":\"2026-01-23T16:15:53.000\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndm-verity: disable recursive forward error correction\\n\\nThere are two problems with the recursive correction:\\n\\n1. It may cause denial-of-service. In fec_read_bufs, there is a loop that\\nhas 253 iterations. For each iteration, we may call verity_hash_for_block\\nrecursively. There is a limit of 4 nested recursions - that means that\\nthere may be at most 253^4 (4 billion) iterations. Red Hat QE team\\nactually created an image that pushes dm-verity to this limit - and this\\nimage just makes the udev-worker process get stuck in the \u0027D\u0027 state.\\n\\n2. It doesn\u0027t work. In fec_read_bufs we store data into the variable\\n\\\"fio-\u003ebufs\\\", but fio bufs is shared between recursive invocations, if\\n\\\"verity_hash_for_block\\\" invoked correction recursively, it would\\noverwrite partially filled fio-\u003ebufs.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/232948cf600fba69aff36b25d85ef91a73a35756\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d9f3e47d3fae0c101d9094bc956ed24e7a0ee801\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}