{"cve":"CVE-2026-63898","nvd":{"published":"2026-07-19T16:17:07.370","modified":"2026-10-30T14:38:34.630","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: serial: mct_u232: fix memory corruption with small endpoint\n\nThe driver overrides the maximum transfer size for a specific device\nwhich only accepts 16 byte packets for its 32 byte bulk-out endpoint.\n\nMake sure to never increase the maximum transfer size to prevent slab\ncorruption should a malicious device report a smaller endpoint max\npacket size than expected.","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/39e295a91e80f3b91f61c7ada2bde434dcaba20d","https://git.kernel.org/stable/c/57f332af1745014cd7e40414814ffaa6bc7d3b5b","https://git.kernel.org/stable/c/6cb48f8890f9b2051d7c34823057296a536a31c5","https://git.kernel.org/stable/c/90dbad14b109e5fdfb4934ff61e561d11ba3742d","https://git.kernel.org/stable/c/915b36d701950503c4ea0f6e314b10868e59fce3"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-30T15:05:48.213661142+00:00"},"epss":{"cve":"CVE-2026-63898","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."]}