FKIE_CVE-2026-63904

Vulnerability from fkie_nvd - Published: 2026-07-19 16:17 - Updated: 2026-07-19 16:17
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/52f2ad3f7e5eb3b5908e1d685d4342519dc9cfcd
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5de7df75ef3a2756b25fe3d582a4a2970444fe5a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/69020fa089f1bf0e1a10a15265f31b143a846409
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/75f6d3da2cc646983f41807ef98851569c12bca9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ae87f505917e703ae3b487d9663d78826ff43608
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e3eec3005de44e7f37d8d7724be636446516ab42
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e794bd67b3faf98af46f958897f6b91412c7d2a9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f141b01eaa58ac7e323931d670318aa247bff087
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/class/usbtmc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "e794bd67b3faf98af46f958897f6b91412c7d2a9",
              "status": "affected",
              "version": "dbf3e7f654c0f06a932b8fcafac78de9d0b81d68",
              "versionType": "git"
            },
            {
              "lessThan": "e3eec3005de44e7f37d8d7724be636446516ab42",
              "status": "affected",
              "version": "dbf3e7f654c0f06a932b8fcafac78de9d0b81d68",
              "versionType": "git"
            },
            {
              "lessThan": "ae87f505917e703ae3b487d9663d78826ff43608",
              "status": "affected",
              "version": "dbf3e7f654c0f06a932b8fcafac78de9d0b81d68",
              "versionType": "git"
            },
            {
              "lessThan": "5de7df75ef3a2756b25fe3d582a4a2970444fe5a",
              "status": "affected",
              "version": "dbf3e7f654c0f06a932b8fcafac78de9d0b81d68",
              "versionType": "git"
            },
            {
              "lessThan": "69020fa089f1bf0e1a10a15265f31b143a846409",
              "status": "affected",
              "version": "dbf3e7f654c0f06a932b8fcafac78de9d0b81d68",
              "versionType": "git"
            },
            {
              "lessThan": "75f6d3da2cc646983f41807ef98851569c12bca9",
              "status": "affected",
              "version": "dbf3e7f654c0f06a932b8fcafac78de9d0b81d68",
              "versionType": "git"
            },
            {
              "lessThan": "f141b01eaa58ac7e323931d670318aa247bff087",
              "status": "affected",
              "version": "dbf3e7f654c0f06a932b8fcafac78de9d0b81d68",
              "versionType": "git"
            },
            {
              "lessThan": "52f2ad3f7e5eb3b5908e1d685d4342519dc9cfcd",
              "status": "affected",
              "version": "dbf3e7f654c0f06a932b8fcafac78de9d0b81d68",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/class/usbtmc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.6"
            },
            {
              "lessThan": "4.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.259",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.210",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.176",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.143",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.93",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.35",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.12",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "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."
    }
  ],
  "id": "CVE-2026-63904",
  "lastModified": "2026-07-19T16:17:08.130",
  "metrics": {},
  "published": "2026-07-19T16:17:08.130",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/52f2ad3f7e5eb3b5908e1d685d4342519dc9cfcd"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5de7df75ef3a2756b25fe3d582a4a2970444fe5a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/69020fa089f1bf0e1a10a15265f31b143a846409"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/75f6d3da2cc646983f41807ef98851569c12bca9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ae87f505917e703ae3b487d9663d78826ff43608"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e3eec3005de44e7f37d8d7724be636446516ab42"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e794bd67b3faf98af46f958897f6b91412c7d2a9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f141b01eaa58ac7e323931d670318aa247bff087"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.