{"id":"CVE-2026-19667","published":"2026-09-16T14:17:05.037","lastModified":"2026-09-17T19:16:41.913","description":"If an attacker-controlled authoritative server can produce a negative answer that is exactly 65536 bytes, then a flaw in `named` results in a negative cache entry of 0 bytes. When this entry is subsequently read, `named` aborts.\nThis issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1.","cvssScore":7.5,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwes":["CWE-197"],"vendors":[],"products":[],"references":[{"url":"https://downloads.isc.org/isc/bind9/9.20.29","tags":[]},{"url":"https://downloads.isc.org/isc/bind9/9.21.26","tags":[]},{"url":"https://kb.isc.org/docs/cve-2026-19667","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}