{"cve":"CVE-2020-12663","nvd":{"published":"2020-05-19T14:15:11.253","modified":"2026-06-17T02:52:05.923","status":"Modified","description":"Unbound before 1.10.1 has an infinite loop via malformed DNS answers received from upstream servers.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-835"],"references":["http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00067.html","http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00069.html","http://www.openwall.com/lists/oss-security/2020/05/19/5","https://lists.debian.org/debian-lts-announce/2021/02/msg00017.html","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F5NFROI2OMCZLYRTCNGHGO3TUD32LCIQ/"],"products":["canonical:ubuntu_linux","debian:debian_linux","fedoraproject:fedora","nlnetlabs:unbound","opensuse:leap"],"source":"nvd","synced_at":"2026-10-19T21:05:42.039641217+00:00"},"epss":{"cve":"CVE-2020-12663","score":0.03588,"percentile":0.89425,"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."]}