{"cve":"CVE-2021-47401","nvd":{"published":"2024-05-21T15:15:25.563","modified":"2026-08-04T10:17:02.143","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nipack: ipoctal: fix stack information leak\n\nThe tty driver name is used also after registering the driver and must\nspecifically not be allocated on the stack to avoid leaking information\nto user space (or triggering an oops).\n\nDrivers should not try to encode topology information in the tty device\nname but this one snuck in through staging without anyone noticing and\nanother driver has since copied this malpractice.\n\nFixing the ABI is a separate issue, but this at least plugs the security\nhole.","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:N","score":5.5},"cwes":["CWE-668"],"references":["https://git.kernel.org/stable/c/0a9c36a2e06a249acbed64e8e0b84637c2ad7575","https://git.kernel.org/stable/c/2725925982dc96a78069cd118ea3d66759bfdad7","https://git.kernel.org/stable/c/5f6a309a699675680df15d9b6d389114515b4426","https://git.kernel.org/stable/c/741ea2670e021350e54f491106bdaa22dc50e6a0","https://git.kernel.org/stable/c/829f13d6079cf7a2465522f39acb43033e9b320d"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:50:30.954589733+00:00"},"epss":{"cve":"CVE-2021-47401","score":0.00252,"percentile":0.16727,"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."]}