{"cve":"CVE-2021-3468","nvd":{"published":"2021-06-02T16:15:08.960","modified":"2026-06-17T04:05:09.557","status":"Modified","description":"A flaw was found in avahi in versions 0.6 up to 0.8. The event used to signal the termination of the client connection on the avahi Unix socket is not correctly handled in the client_work function, allowing a local attacker to trigger an infinite loop. The highest threat from this vulnerability is to the availability of the avahi service, which becomes unresponsive after this flaw is triggered.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-835"],"references":["https://bugzilla.redhat.com/show_bug.cgi?id=1939614","https://lists.debian.org/debian-lts-announce/2022/06/msg00009.html","https://lists.debian.org/debian-lts-announce/2023/06/msg00028.html","https://bugzilla.redhat.com/show_bug.cgi?id=1939614","https://lists.debian.org/debian-lts-announce/2022/06/msg00009.html"],"products":["avahi:avahi","debian:debian_linux"],"source":"nvd","synced_at":"2026-10-19T21:18:09.669877188+00:00"},"epss":{"cve":"CVE-2021-3468","score":0.00439,"percentile":0.38177,"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."]}