CVE-2026-63904 (GCVE-0-2026-63904)

Vulnerability from cvelistv5 – Published: 2026-07-19 14:55 – Updated: 2026-07-19 14:55
VLAI
Title
usb: usbtmc: check URB actual_length for interrupt-IN notifications
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: dbf3e7f654c0f06a932b8fcafac78de9d0b81d68 , < e794bd67b3faf98af46f958897f6b91412c7d2a9 (git)
Affected: dbf3e7f654c0f06a932b8fcafac78de9d0b81d68 , < e3eec3005de44e7f37d8d7724be636446516ab42 (git)
Affected: dbf3e7f654c0f06a932b8fcafac78de9d0b81d68 , < ae87f505917e703ae3b487d9663d78826ff43608 (git)
Affected: dbf3e7f654c0f06a932b8fcafac78de9d0b81d68 , < 5de7df75ef3a2756b25fe3d582a4a2970444fe5a (git)
Affected: dbf3e7f654c0f06a932b8fcafac78de9d0b81d68 , < 69020fa089f1bf0e1a10a15265f31b143a846409 (git)
Affected: dbf3e7f654c0f06a932b8fcafac78de9d0b81d68 , < 75f6d3da2cc646983f41807ef98851569c12bca9 (git)
Affected: dbf3e7f654c0f06a932b8fcafac78de9d0b81d68 , < f141b01eaa58ac7e323931d670318aa247bff087 (git)
Affected: dbf3e7f654c0f06a932b8fcafac78de9d0b81d68 , < 52f2ad3f7e5eb3b5908e1d685d4342519dc9cfcd (git)
guessed Create a notification for this product.
Linux Linux Affected: 4.6
Unaffected: 0 , < 4.6 (semver)
Unaffected: 5.10.259 , ≤ 5.10.* (semver)
Unaffected: 5.15.210 , ≤ 5.15.* (semver)
Unaffected: 6.1.176 , ≤ 6.1.* (semver)
Unaffected: 6.6.143 , ≤ 6.6.* (semver)
Unaffected: 6.12.93 , ≤ 6.12.* (semver)
Unaffected: 6.18.35 , ≤ 6.18.* (semver)
Unaffected: 7.0.12 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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          "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."
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    "dateReserved": "2026-07-19T07:54:57.019Z",
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      "cve": "CVE-2026-63904",
      "id": "CVE-2026-63904",
      "initial_release_date": "2026-07-19T00:00:00+00:00",
      "product_status:known_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: usb: usbtmc: check URB actual_length for interrupt-IN notifications",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-63904.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-10T02:30:31Z",
      "cve": "CVE-2026-63904",
      "id": "CVE-2026-63904",
      "initial_release_date": "2026-07-21T13:03:53Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "673",
      "product_status:known_not_affected": "48",
      "product_status:recommended": "250",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-63904",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-63904.json",
      "version": "11"
    }
  }
}



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