CVE-2026-63904 (GCVE-0-2026-63904)
Vulnerability from cvelistv5
Published
2026-07-19 14:55
Modified
2026-07-19 14:55
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: usbtmc: check URB actual_length for interrupt-IN notifications USBTMC devices can use an optional interrupt endpoint for notification messages. These typically contain two-byte headers indicating the payload format, but the driver does not check if these headers are present before accessing the data buffers. In cases where the URB actual_length is not enough to fit these headers, the driver will either cause an out-of-bounds read, or consume stale leftover data from a previous notification. Fix by checking if actual_data contains enough bytes for the headers, otherwise resubmit URB to the interrupt endpoint.
References
Impacted products
Vendor Product Version
Linux Linux Version: dbf3e7f654c0f06a932b8fcafac78de9d0b81d68
Version: dbf3e7f654c0f06a932b8fcafac78de9d0b81d68
Version: dbf3e7f654c0f06a932b8fcafac78de9d0b81d68
Version: dbf3e7f654c0f06a932b8fcafac78de9d0b81d68
Version: dbf3e7f654c0f06a932b8fcafac78de9d0b81d68
Version: dbf3e7f654c0f06a932b8fcafac78de9d0b81d68
Version: dbf3e7f654c0f06a932b8fcafac78de9d0b81d68
Version: dbf3e7f654c0f06a932b8fcafac78de9d0b81d68
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{
  "containers": {
    "cna": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/class/usbtmc.c"
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          "vendor": "Linux",
          "versions": [
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              "version": "0",
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              "versionType": "original_commit_for_fix"
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      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: usbtmc: check URB actual_length for interrupt-IN notifications\n\nUSBTMC devices can use an optional interrupt endpoint for notification\nmessages. These typically contain two-byte headers indicating the\npayload format, but the driver does not check if these headers are\npresent before accessing the data buffers. In cases where the URB\nactual_length is not enough to fit these headers, the driver will either\ncause an out-of-bounds read, or consume stale leftover data from a\nprevious notification.\n\nFix by checking if actual_data contains enough bytes for the headers,\notherwise resubmit URB to the interrupt endpoint."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-19T14:55:11.547Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/e794bd67b3faf98af46f958897f6b91412c7d2a9"
        },
        {
          "url": "https://git.kernel.org/stable/c/e3eec3005de44e7f37d8d7724be636446516ab42"
        },
        {
          "url": "https://git.kernel.org/stable/c/ae87f505917e703ae3b487d9663d78826ff43608"
        },
        {
          "url": "https://git.kernel.org/stable/c/5de7df75ef3a2756b25fe3d582a4a2970444fe5a"
        },
        {
          "url": "https://git.kernel.org/stable/c/69020fa089f1bf0e1a10a15265f31b143a846409"
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        {
          "url": "https://git.kernel.org/stable/c/75f6d3da2cc646983f41807ef98851569c12bca9"
        },
        {
          "url": "https://git.kernel.org/stable/c/f141b01eaa58ac7e323931d670318aa247bff087"
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        {
          "url": "https://git.kernel.org/stable/c/52f2ad3f7e5eb3b5908e1d685d4342519dc9cfcd"
        }
      ],
      "title": "usb: usbtmc: check URB actual_length for interrupt-IN notifications",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-63904",
    "datePublished": "2026-07-19T14:55:11.547Z",
    "dateReserved": "2026-07-19T07:54:57.019Z",
    "dateUpdated": "2026-07-19T14:55:11.547Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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