{"id":"UBUNTU-CVE-2025-30187","details":"In some circumstances, when DNSdist is configured to use the nghttp2 library to process incoming DNS over HTTPS queries, an attacker might be able to cause a denial of service by crafting a DoH exchange that triggers an unbounded I/O read loop, causing an unexpected consumption of CPU resources.","modified":"2026-02-13T18:28:56.469328Z","published":"2025-09-18T10:15:00Z","related":["USN-8037-1"],"upstream":["CVE-2025-30187"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-30187"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2025-30187"},{"type":"REPORT","url":"https://www.openwall.com/lists/oss-security/2025/09/18/1"},{"type":"REPORT","url":"https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2025-05.html"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8037-1"}],"affected":[{"package":{"name":"dnsdist","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/dnsdist@1.9.10-1ubuntu0.1?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.9.10-1ubuntu0.1"}]}],"versions":["1.9.8-1","1.9.10-1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"dnsdist","binary_version":"1.9.10-1ubuntu0.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-30187.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"type":"Ubuntu","score":"medium"}]}