{"id":"CVE-2026-11605","details":"The issue is a resource exhaustion vulnerability associated with DNSSEC validation. BIND always validates all RRSIG records in an answer, even if they are not strictly needed. A query to an authoritative server/zone which returns many valid but superfluous RRSIG records causes the validator to waste disproportionate CPU time.\nThis issue affects BIND 9 versions 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, and 9.20.9-S1 through 9.20.24-S1.","modified":"2026-11-04T02:47:24.134237965Z","published":"2026-07-22T15:16:51.573Z","related":["SUSE-SU-2026:3426-1","openSUSE-SU-2026:11375-1","openSUSE-SU-2026:21489-1"],"database_specific":{},"references":[{"type":"WEB","url":"https://downloads.isc.org/isc/bind9/9.20.26"},{"type":"WEB","url":"https://downloads.isc.org/isc/bind9/9.21.24"},{"type":"ADVISORY","url":"https://kb.isc.org/docs/cve-2026-11605"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/isc-projects/bind9","events":[{"introduced":"14bbdfc7b9db0870a0b8941ca8812d9983fdba1a"},{"last_affected":"e5d43f1764259da929f6c0200a9db2081141998a"},{"introduced":"98f2a5b7f486829b5644e5e9d6119c8cfefcdf70"},{"last_affected":"e5d43f1764259da929f6c0200a9db2081141998a"},{"introduced":"b732da695eecc0526950e2c722cde0bf23e5a070"},{"last_affected":"ef0603035791f16bc3bb7de20099b7b4434a24cb"}],"database_specific":{"extracted_events":[{"cpe":"cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*","range":[{"introduced":"9.20.0"},{"last_affected":"9.20.24"}],"source":"CPE_RANGE"},{"cpe":"cpe:2.3:a:isc:bind:*:*:*:*:supported_preview:*:*:*","range":[{"introduced":"9.20.9"},{"last_affected":"9.20.24"}],"source":"CPE_RANGE"},{"range":[{"introduced":"9.21.0"},{"last_affected":"9.21.23"}],"source":"CPE_RANGE","cpe":"cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*"}]}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-11605.json"}},{"ranges":[{"type":"GIT","repo":"https://gitlab.isc.org/isc-projects/bind9","events":[{"introduced":"14bbdfc7b9db0870a0b8941ca8812d9983fdba1a"},{"last_affected":"e5d43f1764259da929f6c0200a9db2081141998a"},{"introduced":"98f2a5b7f486829b5644e5e9d6119c8cfefcdf70"},{"last_affected":"e5d43f1764259da929f6c0200a9db2081141998a"},{"introduced":"b732da695eecc0526950e2c722cde0bf23e5a070"},{"last_affected":"ef0603035791f16bc3bb7de20099b7b4434a24cb"}],"database_specific":{"extracted_events":[{"cpe":"cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*","range":[{"introduced":"9.20.0"},{"last_affected":"9.20.24"}],"source":"CPE_RANGE"},{"cpe":"cpe:2.3:a:isc:bind:*:*:*:*:supported_preview:*:*:*","range":[{"introduced":"9.20.9"},{"last_affected":"9.20.24"}],"source":"CPE_RANGE"},{"source":"CPE_RANGE","cpe":"cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*","range":[{"introduced":"9.21.0"},{"last_affected":"9.21.23"}]}]}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-11605.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"}]}