{"cve":"CVE-2021-47403","nvd":{"published":"2024-05-21T15:15:25.803","modified":"2026-06-17T04:17:23.510","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nipack: ipoctal: fix module reference leak\n\nA reference to the carrier module was taken on every open but was only\nreleased once when the final reference to the tty struct was dropped.\n\nFix this by taking the module reference and initialising the tty driver\ndata when installing the tty.","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-200"],"references":["https://git.kernel.org/stable/c/31398849b84ebae0d43a1cf379cb9895597f221a","https://git.kernel.org/stable/c/3253c87e1e5bc0107aab773af2f135ebccf38666","https://git.kernel.org/stable/c/7cea848678470daadbfdaa6a112b823c290f900c","https://git.kernel.org/stable/c/811178f296b16af30264def74c8d2179a72d5562","https://git.kernel.org/stable/c/9c5b77a7ffc983b2429ce158b50497c5d3c86a69"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:50:30.954589733+00:00"},"epss":{"cve":"CVE-2021-47403","score":0.00249,"percentile":0.16247,"date":"2026-10-31"},"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."]}