{"cve":"CVE-2026-63899","nvd":{"published":"2026-07-19T16:17:07.497","modified":"2026-10-30T14:38:26.447","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: serial: mxuport: fix memory corruption with small endpoint\n\nMake sure that the bulk-out endpoint max packet size is at least eight\nbytes to avoid user-controlled slab corruption should a malicious device\nreport a smaller size.","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:H/A:H","score":7.8},"cwes":["CWE-787"],"references":["https://git.kernel.org/stable/c/086b858b5f5125bc9d967ea2bd825f83d9f8f29d","https://git.kernel.org/stable/c/2f3661eb2446e1ef593da45e01a3b21a906768ec","https://git.kernel.org/stable/c/4085f0dbb1ce2251c9a5938d693de6593f0ab2bd","https://git.kernel.org/stable/c/6c0cf56f00f280d72180bb6ce79741bc787a6269","https://git.kernel.org/stable/c/b40166b4ef96067620a0f248e74ad9658c8f680c"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-30T15:05:48.213661142+00:00"},"epss":{"cve":"CVE-2026-63899","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."]}