{"id":"UBUNTU-CVE-2026-123589","details":"The DNS-over-QUIC (DoQ) server in hickory-server (hickory-dns) before 0.26.2 does not apply any timeout when reading a request message from a QUIC stream, bypassing all configured timeouts. A remote unauthenticated client can open a connection and a request stream and hold it open indefinitely, consuming server resources and causing a denial of service.","modified":"2026-11-10T02:50:13.793918697Z","published":"2026-11-09T00:00:00Z","upstream":["CVE-2026-123589"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-123589"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-123589"},{"type":"REPORT","url":"https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-g8wg-4mwh-fjfv"},{"type":"REPORT","url":"https://www.vulncheck.com/advisories/hickory-dns-before-0.26.2-denial-of-service-via-missing-dns-over-quic-request-read-timeout"}],"affected":[{"package":{"name":"rust-hickory-server","ecosystem":"Ubuntu:26.10","purl":"pkg:deb/ubuntu/rust-hickory-server?arch=source&distro=stonking"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.24.4-2","0.26.1-1"],"ecosystem_specific":{"binaries":[{"binary_name":"librust-hickory-server-dev","binary_version":"0.26.1-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-123589.json"}},{"package":{"name":"rust-hickory-server","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/rust-hickory-server?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.24.4-2"],"ecosystem_specific":{"binaries":[{"binary_name":"librust-hickory-server-dev","binary_version":"0.24.4-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-123589.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}