CVE-2026-98481 (GCVE-0-2026-98481)
Vulnerability from cvelistv5
Published
2026-10-18 15:15
Modified
2026-10-19 09:20
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: nfc: port100: reject frames whose declared length exceeds the received data port100_recv_response() passes the URB transfer buffer to port100_rx_frame_is_valid(), which checksums le16_to_cpu(frame->datalen) bytes of frame->data. datalen is a 16-bit field supplied by the device and is never checked against the number of bytes actually received (urb->actual_length), so a device reporting a datalen larger than the received frame makes port100_data_checksum() read out of bounds past the transfer buffer. Reject a response whose declared frame size does not fit the received length before validating it. Found by 0sec (https://0sec.ai) using automated source analysis; the missing bound is evident from source. Compile-tested.
References
Impacted products
Vendor Product Version
Linux Linux Version: 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06
Version: 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06
Version: 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06
Version: 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06
Version: 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06
Version: 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06
Version: 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06
Version: 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06
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{
  "containers": {
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          "programFiles": [
            "drivers/nfc/port100.c"
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              "version": "0",
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      "cpeApplicability": [
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: port100: reject frames whose declared length exceeds the received data\n\nport100_recv_response() passes the URB transfer buffer to\nport100_rx_frame_is_valid(), which checksums le16_to_cpu(frame-\u003edatalen)\nbytes of frame-\u003edata. datalen is a 16-bit field supplied by the device\nand is never checked against the number of bytes actually received\n(urb-\u003eactual_length), so a device reporting a datalen larger than the\nreceived frame makes port100_data_checksum() read out of bounds past the\ntransfer buffer.\n\nReject a response whose declared frame size does not fit the received\nlength before validating it.\n\nFound by 0sec (https://0sec.ai) using automated source analysis; the\nmissing bound is evident from source. Compile-tested."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:20:18.735Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/0d482995f0cdd0302450aa300c684c642d8ab31f"
        },
        {
          "url": "https://git.kernel.org/stable/c/9e8df087826b9999d1b83b06f5d85675d5a69c9e"
        },
        {
          "url": "https://git.kernel.org/stable/c/db66a30588630c7de30ef033f00daddef69f6ad9"
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        {
          "url": "https://git.kernel.org/stable/c/144ad477c381e2c592b64898d04ab4ce03b32861"
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          "url": "https://git.kernel.org/stable/c/e4da1452e10c6472a4bac48dc2f6a35fff1fcd69"
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          "url": "https://git.kernel.org/stable/c/14b1467cfc6630583650f33538174c5a1ec685ab"
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        {
          "url": "https://git.kernel.org/stable/c/035056e07ea65be670284246d9bc62f2f00ff4a3"
        },
        {
          "url": "https://git.kernel.org/stable/c/092c6a605cbd6414ef499834c2e0da69c2c3388e"
        }
      ],
      "title": "nfc: port100: reject frames whose declared length exceeds the received data",
      "x_generator": {
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98481",
    "datePublished": "2026-10-18T15:15:55.360Z",
    "dateReserved": "2026-09-25T10:25:14.352Z",
    "dateUpdated": "2026-10-19T09:20:18.735Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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