{"cve":"CVE-2021-3671","nvd":{"published":"2021-10-12T18:15:08.357","modified":"2026-06-17T04:05:32.430","status":"Modified","description":"A null pointer de-reference was found in the way samba kerberos server handled missing sname in TGS-REQ (Ticket Granting Server - Request). An authenticated user could use this flaw to crash the samba server.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":6.5},"cwes":["CWE-476"],"references":["https://bugzilla.redhat.com/show_bug.cgi?id=2013080%2C","https://bugzilla.samba.org/show_bug.cgi?id=14770%2C","https://github.com/heimdal/heimdal/commit/04171147948d0a3636bc6374181926f0fb2ec83a","https://lists.debian.org/debian-lts-announce/2022/11/msg00034.html","https://security.netapp.com/advisory/ntap-20221215-0002/"],"products":["debian:debian_linux","netapp:management_services_for_element_software","netapp:management_services_for_netapp_hci","netapp:ontap_select_deploy_administration_utility","samba:samba"],"source":"nvd","synced_at":"2026-10-19T21:24:39.218183596+00:00"},"epss":{"cve":"CVE-2021-3671","score":0.02118,"percentile":0.81859,"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."]}