{"cve":"CVE-2026-63904","nvd":{"published":"2026-07-19T16:17:08.130","modified":"2026-10-30T14:37:41.347","status":"Analyzed","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","score":7.1},"cwes":["CWE-125"],"references":["https://git.kernel.org/stable/c/52f2ad3f7e5eb3b5908e1d685d4342519dc9cfcd","https://git.kernel.org/stable/c/5de7df75ef3a2756b25fe3d582a4a2970444fe5a","https://git.kernel.org/stable/c/69020fa089f1bf0e1a10a15265f31b143a846409","https://git.kernel.org/stable/c/75f6d3da2cc646983f41807ef98851569c12bca9","https://git.kernel.org/stable/c/ae87f505917e703ae3b487d9663d78826ff43608"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-30T15:05:48.213661142+00:00"},"epss":{"cve":"CVE-2026-63904","score":0.00226,"percentile":0.13305,"date":"2026-10-30"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}