{"id":"CVE-2026-19667","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-19667","generatedAt":"2026-10-28T00:18:46.982Z","title":"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.","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.","published":"2026-09-16T14:17:05.000Z","lastModified":"2026-10-26T20:10:00.000Z","status":"Awaiting Analysis","sourceIdentifier":"security-officer@isc.org","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-197"],"affected":[],"epss":{"score":0.00569,"percentile":0.46847,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.57%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://downloads.isc.org/isc/bind9/9.20.29","source":"security-officer@isc.org"},{"url":"https://downloads.isc.org/isc/bind9/9.21.26","source":"security-officer@isc.org"},{"url":"https://kb.isc.org/docs/cve-2026-19667","source":"security-officer@isc.org"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-19667","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}