{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2025-21742",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2025-21742"
  ],
  "published": "2025-02-27T02:12:01Z",
  "summary": "usbnet: ipheth: use static NDP16 location in URB",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nusbnet: ipheth: use static NDP16 location in URB\n\nOriginal code allowed for the start of NDP16 to be anywhere within the\nURB based on the `wNdpIndex` value in NTH16. Only the start position of\nNDP16 was checked, so it was possible for even the fixed-length part\nof NDP16 to extend past the end of URB, leading to an out-of-bounds\nread.\n\nOn iOS devices, the NDP16 header always directly follows NTH16. Rely on\nand check for this specific format.\n\nThis, along with NCM-specific minimal URB length check that already\nexists, will ensure that the fixed-length part of NDP16 plus a set\namount of DPEs fit within the URB.\n\nNote that this commit alone does not fully address the OoB read.\nThe limit on the amount of DPEs needs to be enforced separately.",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
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        "1:6.6.28-1+rpt1",
        "1:6.6.31-1+rpt1",
        "1:6.6.47-1+rpt1",
        "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"
      ],
      "ecosystem_specific": {
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            "binary_version": "1:6.6.20-1+rpt1"
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            "binary_version": "1:6.6.20-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.6.20+rpt-rpi-v7",
            "binary_version": "1:6.6.20-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.6.20+rpt-rpi-v7l",
            "binary_version": "1:6.6.20-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.6.20+rpt-rpi-v8",
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            "upstream_version": "6.6.20",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.6.78"
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            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.6.78"
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          }
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    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-21742"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/8fb062178e1ce180e2cfdc9abc83a1b9fea381ca"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/cf1ac7f7cf601ac31d1580559c002b5e37b733b7"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2b619445dcb6dab97d8ed033fb57225aca1288c4"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/86586dcb75cb8fd062a518aca8ee667938b91efb"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
  }
}