{"id":"UBUNTU-CVE-2026-123575","details":"Hickory DNS before 0.26.2 contains a resource exhaustion vulnerability in its DNS-over-HTTPS HTTP/2 server that lacks sufficient timeouts or limits for incomplete request bodies. Remote attackers can open DoH connections, send incomplete request bodies, and hold connections open to exhaust server memory.","modified":"2026-11-10T02:50:21.845401841Z","published":"2026-11-09T00:00:00Z","upstream":["CVE-2026-123575"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-123575"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-123575"},{"type":"REPORT","url":"https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-g5xf-qv55-wv37"},{"type":"REPORT","url":"https://www.vulncheck.com/advisories/hickory-dns-before-0.26.2-doh-memory-exhaustion-via-incomplete-request-bodies"}],"affected":[{"package":{"name":"rust-hickory-dns","ecosystem":"Ubuntu:26.10","purl":"pkg:deb/ubuntu/rust-hickory-dns?arch=source&distro=stonking"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.24.4-1","0.25.2-3","0.26.1-1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.26.1-1","binary_name":"hickory-dns"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-123575.json"}},{"package":{"name":"rust-hickory-dns","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/rust-hickory-dns?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.24.4-1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.24.4-1","binary_name":"hickory-dns"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-123575.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:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}