{"id":"CVE-2026-123584","title":"Hickory-DNS 0.26.0 before 0.26.2 UDP Client Denial of Service via Spoofed Responses","summary":"The hickory-net crate in Hickory DNS 0.26.0 before 0.26.2 stops listening and returns an error when a client UDP connection receives a datagram that cannot be parsed as a DNS message. Remote attackers who guess the query's source port, w…","severity":"medium","cvss":5.9,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"cna","cwe":["CWE-696"],"vendor":"hickory-dns","product":"hickory-dns","affected":["hickory-dns >= 0.26.0 < 0.26.2"],"published":"2026-11-08","updated":"2026-11-08","sourceUpdated":"2026-11-08T01:38:17.587Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-123584","references":[{"url":"https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-v44v-c8m4-gc43","label":"GitHub Security Advisory (GHSA-v44v-c8m4-gc43)"},{"url":"https://www.vulncheck.com/advisories/hickory-dns-0.26.0-before-0.26.2-udp-client-denial-of-service-via-spoofed-responses","label":"VulnCheck Advisory: Hickory-DNS 0.26.0 before 0.26.2 UDP Client Denial of Service via Spoofed Responses"}],"tags":["cve.org"],"ingestedAt":"2026-11-08T02:43:18.651Z","slug":"CVE-2026-123584","body":"## Overview\n\nThe hickory-net crate in Hickory DNS 0.26.0 before 0.26.2 stops listening and returns an error when a client UDP connection receives a datagram that cannot be parsed as a DNS message. Remote attackers who guess the query's source port, without knowing the transaction ID, can spoof malformed responses to abort client queries, causing denial of service.\n\n## Affected\n\n- `hickory-dns >= 0.26.0 < 0.26.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":32,"depthScoreParts":{"impact":32.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}