{"action":"Upgrade knot-resolver to 5.4.1-2 or later.","affected":[{"fixed":"5.4.1-2","introduced":"0"}],"component":"knot-resolver","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["5.4.1-2"],"id":"tcs_01M5NFYP2ECYDGS1WRQJR8JB76","modified_at":"2026-10-23T18:03:32.647562293Z","published_at":"2021-08-25T01:15:11.087Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2021-40083","https://security-tracker.debian.org/tracker/CVE-2021-40083"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2021-40083","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2021-40083"}],"summary":"Knot Resolver before 5.3.2 is prone to an assertion failure, triggerable by a remote attacker in an edge case (NSEC3 with too many iterations used for a positive wildcard proof)."}