{"cve":"CVE-2021-47358","nvd":{"published":"2024-05-21T15:15:22.073","modified":"2026-08-04T10:16:59.820","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: greybus: uart: fix tty use after free\n\nUser space can hold a tty open indefinitely and tty drivers must not\nrelease the underlying structures until the last user is gone.\n\nSwitch to using the tty-port reference counter to manage the life time\nof the greybus tty state to avoid use after free after a disconnect.","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-416"],"references":["https://git.kernel.org/stable/c/4dc56951a8d9d61d364d346c61a5f1d70b4f5e14","https://git.kernel.org/stable/c/64062fcaca8872f063ec9da011e7bf30470be33f","https://git.kernel.org/stable/c/92b67aaafb7c449db9f0c3dcabc0ff967cb3a42d","https://git.kernel.org/stable/c/92dc0b1f46e12cfabd28d709bb34f7a39431b44f","https://git.kernel.org/stable/c/9872ff6fdce8b229f01993b611b5d1719cb70ff1"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:50:30.954589733+00:00"},"epss":{"cve":"CVE-2021-47358","score":0.00244,"percentile":0.15704,"date":"2026-11-01"},"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."]}