{"cve":"CVE-2021-38199","nvd":{"published":"2021-08-08T20:15:07.073","modified":"2026-10-08T21:17:39.333","status":"Modified","description":"fs/nfs/nfs4client.c in the Linux kernel before 5.13.4 has incorrect connection-setup ordering, which allows operators of remote NFSv4 servers to cause a denial of service (hanging of mounts) by arranging for those servers to be unreachable during trunking detection.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":6.5},"cwes":[],"references":["https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4","https://github.com/torvalds/linux/commit/dd99e9f98fbf423ff6d365b37a98e8879170f17c","https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html","https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html","https://security.netapp.com/advisory/ntap-20210902-0010/"],"products":["debian:debian_linux","linux:linux_kernel","netapp:element_software","netapp:hci_bootstrap_os","netapp:hci_management_node","netapp:solidfire"],"source":"nvd","synced_at":"2026-10-19T21:21:13.713336758+00:00"},"epss":{"cve":"CVE-2021-38199","score":0.01245,"percentile":0.69094,"date":"2026-10-25"},"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."]}