{"id":"CVE-2025-30187","summary":"Denial of service via crafted DoH exchange in PowerDNS DNSdist","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":"2026-07-11T03:54:18.421397464Z","published":"2025-09-18T09:21:32.274Z","related":["SUSE-SU-2026:0888-1","SUSE-SU-2026:20995-1","openSUSE-SU-2026:20461-1"],"database_specific":{"cna_assigner":"OX","cwe_ids":["CWE-835"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/30xxx/CVE-2025-30187.json"},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2025/09/18/1"},{"type":"WEB","url":"https://repo.powerdns.com/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/30xxx/CVE-2025-30187.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-30187"},{"type":"ADVISORY","url":"https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2025-05.html"},{"type":"PACKAGE","url":"https://github.com/PowerDNS/pdns"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/powerdns/pdns","events":[{"introduced":"298a9d67fb760a12eabe89164f92fb814572aea8"},{"fixed":"6b12ce92c32c5ad5b871c59bec333cc5aeb5810d"},{"introduced":"89747e81bc60d7950276d5fda3ca669fa81b7cf9"},{"fixed":"8f33ac184f948aded43fe147455c27c48b795c11"}],"database_specific":{"extracted_events":[{"introduced":"1.9.0"},{"fixed":"1.9.11"},{"introduced":"2.0.0"},{"fixed":"2.0.1"}],"source":"AFFECTED_FIELD"}}],"versions":["dnsdist-2.0.0","dnsdist-1.9.10","dnsdist-1.9.9","dnsdist-1.9.8","dnsdist-1.9.7","dnsdist-1.9.6","dnsdist-1.9.5","dnsdist-1.9.4","dnsdist-1.9.3","dnsdist-1.9.2","dnsdist-1.9.1","dnsdist-1.9.0"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-30187.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L"}]}