{"id":"CVE-2026-12617","details":"The issue is unexpected program termination based on ordering and/or specific content in responses to queries for CNAME or DNAME, and A records. Specifically, if a client queries for a DNAME and A record below the DNAME to the resolver, and the authoritative server responds positively to the A query but delays the DNAME response and later responds negatively, `named` may quit unexpectedly. Or, if a client queries for a CNAME and A record for the same name to the resolver, and the authoritative server responds positively to the A query but delays the CNAME response and later responds with a self-referential CNAME, the same failure may occur.\nThis issue affects BIND 9 versions 9.18.0 through 9.18.50, 9.20.0 through 9.20.24, 9.18.11-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.","modified":"2026-11-04T02:47:31.298650216Z","published":"2026-07-22T15:16:51.963Z","related":["SUSE-SU-2026:3426-1","SUSE-SU-2026:3452-1","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":"ADVISORY","url":"https://kb.isc.org/docs/cve-2026-12617"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/isc-projects/bind9","events":[{"introduced":"8db45afa1affcb823e68afdeddedf93e136f5d3e"},{"last_affected":"ad1a84a99f853f5194ec0afc52a152f2b9579074"},{"introduced":"1f554acee8df440c2fc211f976b196b31b9c9284"},{"last_affected":"ad1a84a99f853f5194ec0afc52a152f2b9579074"},{"introduced":"14bbdfc7b9db0870a0b8941ca8812d9983fdba1a"},{"last_affected":"e5d43f1764259da929f6c0200a9db2081141998a"},{"introduced":"98f2a5b7f486829b5644e5e9d6119c8cfefcdf70"},{"last_affected":"e5d43f1764259da929f6c0200a9db2081141998a"}],"database_specific":{"extracted_events":[{"source":"CPE_RANGE","cpe":"cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*","range":[{"introduced":"9.18.0"},{"last_affected":"9.18.50"}]},{"source":"CPE_RANGE","cpe":"cpe:2.3:a:isc:bind:*:*:*:*:supported_preview:*:*:*","range":[{"introduced":"9.18.11"},{"last_affected":"9.18.50"}]},{"range":[{"introduced":"9.20.0"},{"last_affected":"9.20.24"}],"source":"CPE_RANGE","cpe":"cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*"},{"range":[{"introduced":"9.20.9"},{"last_affected":"9.20.24"}],"source":"CPE_RANGE","cpe":"cpe:2.3:a:isc:bind:*:*:*:*:supported_preview:*:*:*"}]}}],"versions":["v9.18.50","v9.18.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-12617.json"}},{"ranges":[{"type":"GIT","repo":"https://gitlab.isc.org/isc-projects/bind9","events":[{"introduced":"8db45afa1affcb823e68afdeddedf93e136f5d3e"},{"last_affected":"ad1a84a99f853f5194ec0afc52a152f2b9579074"},{"introduced":"1f554acee8df440c2fc211f976b196b31b9c9284"},{"last_affected":"ad1a84a99f853f5194ec0afc52a152f2b9579074"},{"introduced":"14bbdfc7b9db0870a0b8941ca8812d9983fdba1a"},{"last_affected":"e5d43f1764259da929f6c0200a9db2081141998a"},{"introduced":"98f2a5b7f486829b5644e5e9d6119c8cfefcdf70"},{"last_affected":"e5d43f1764259da929f6c0200a9db2081141998a"}],"database_specific":{"extracted_events":[{"cpe":"cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*","range":[{"introduced":"9.18.0"},{"last_affected":"9.18.50"}],"source":"CPE_RANGE"},{"cpe":"cpe:2.3:a:isc:bind:*:*:*:*:supported_preview:*:*:*","range":[{"introduced":"9.18.11"},{"last_affected":"9.18.50"}],"source":"CPE_RANGE"},{"range":[{"introduced":"9.20.0"},{"last_affected":"9.20.24"}],"source":"CPE_RANGE","cpe":"cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*"},{"cpe":"cpe:2.3:a:isc:bind:*:*:*:*:supported_preview:*:*:*","range":[{"introduced":"9.20.9"},{"last_affected":"9.20.24"}],"source":"CPE_RANGE"}]}}],"versions":["v9.18.50","v9.18.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-12617.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"}]}