{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2025-21826",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2025-21826"
  ],
  "published": "2025-03-06T16:05:04Z",
  "summary": "netfilter: nf_tables: reject mismatching sum of field_len with set key length",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_tables: reject mismatching sum of field_len with set key length\n\nThe field length description provides the length of each separated key\nfield in the concatenation, each field gets rounded up to 32-bits to\ncalculate the pipapo rule width from pipapo_init(). The set key length\nprovides the total size of the key aligned to 32-bits.\n\nRegister-based arithmetics still allows for combining mismatching set\nkey length and field length description, eg. set key length 10 and field\ndescription [ 5, 4 ] leading to pipapo width of 12.",
  "affected": [
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      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
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        "1:6.6.51-1+rpt1",
        "1:6.6.51-1+rpt2",
        "1:6.6.51-1+rpt3",
        "1:6.6.62-1+rpt1",
        "1:6.6.74-1+rpt1"
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      "ecosystem_specific": {
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  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-21826"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/6b467c8feac759f4c5c86d708beca2aa2b29584f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/5083a7ae45003456c253e981b30a43f71230b4a3"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2ac254343d3cf228ae0738b2615fedf85d000752"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/82e491e085719068179ff6a5466b7387cc4bbf32"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/49b7182b97bafbd5645414aff054b4a65d05823d"
    },
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      "url": "https://git.kernel.org/stable/c/ab50d0eff4a939d20c37721fd9766347efcdb6f6"
    },
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    }
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  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T12:19:11Z"
  }
}