{"schemaVersion":3,"id":"USN-8648-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"bind9 vulnerabilities\n\nIt was discovered that Bind incorrectly accepted NSEC3 records whose signer\nname did not match the owning zone. A remote attacker could possibly use\nthis issue to perform NSEC3 impersonation attacks, bypassing DNSSEC\nvalidation. (CVE-2026-10723)\n\nIt was discovered that Bind incorrectly handled Key Records using the\nPRIVATEDNS algorithm. A remote attacker could possibly use this issue to\ncause Bind to crash, resulting in a denial of service. (CVE-2026-10822)\n\nIt was discovered that Bind incorrectly handled wildcard CNAME expansion in\nResponse Policy Zones. A remote attacker could possibly use this issue to\nbypass configured RPZ policies. (CVE-2026-11331)\n\nIt was discovered that Bind performed unnecessary validation of DNSSEC\nsigned records. A remote attacker could possibly use this issue to cause\nBind to use excessive resources, leading to a denial of service. This issue\nonly affected Ubuntu 26.04 LTS. (CVE-2026-11605)\n\nIt was discovered that Bind incorrectly tracked memory usage in the DNS\ncache. A remote attacker could possibly use this issue to cause Bind to use\nmemory beyond configured limits, leading to a denial of service.\n(CVE-2026-11622)\n\nIt was discovered that Bind incorrectly handled signed wildcard records\nwith label count discrepancies and RRSIG validation. A remote attacker\ncould possibly use this issue to perform cache poisoning attacks.\n(CVE-2026-11721)\n\nIt was discovered that Bind incorrectly handled certain CNAME and DNAME\nrecord orderings in the resolver. A remote attacker could possibly use this\nissue to cause Bind to crash, resulting in a denial of service.\n(CVE-2026-12617)\n\nIt was discovered that Bind incorrectly validated out-of-zone NSEC next\nowner names during DNSSEC validation. A remote attacker could possibly use\nthis issue to bypass DNSSEC validation. (CVE-2026-13321)","dates":{"published":"2026-08-19T11:45:39.000Z","modified":"2026-08-19T19:30:09.769Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":null,"severity":"unknown","version":null,"versionLabel":null,"source":null,"vector":null,"computed":false,"selection":"none"},"metrics":[]},"epss":{"probability":null,"percentile":null,"severity":"unknown","asOf":null,"change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[],"last30":[]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[],"affected":[{"vendor":"ubuntu","product":"bind9","name":"bind9","label":"bind9","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/bind9","purlType":"deb","versions":[{"text":"< 1:9.18.39-0ubuntu0.22.04.5","noFixRecorded":false,"fixedIn":null},{"text":"< 1:9.18.39-0ubuntu0.24.04.6","noFixRecorded":false,"fixedIn":null},{"text":"< 1:9.20.24-1ubuntu0.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1:9.18.39-0ubuntu0.22.04.5 | < 1:9.18.39-0ubuntu0.24.04.6 | < 1:9.20.24-1ubuntu0.2","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-8648-1","label":"ubuntu.com/security/notices/USN-8648-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-10723","label":"ubuntu.com/security/CVE-2026-10723","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-10822","label":"ubuntu.com/security/CVE-2026-10822","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-11331","label":"ubuntu.com/security/CVE-2026-11331","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-11605","label":"ubuntu.com/security/CVE-2026-11605","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-11622","label":"ubuntu.com/security/CVE-2026-11622","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-11721","label":"ubuntu.com/security/CVE-2026-11721","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-12617","label":"ubuntu.com/security/CVE-2026-12617","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-13321","label":"ubuntu.com/security/CVE-2026-13321","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2026-10723","CVE-2026-10822","CVE-2026-11331","CVE-2026-11605","CVE-2026-11622","CVE-2026-11721","CVE-2026-12617","CVE-2026-13321"],"downstream":[],"duplicates":[],"related":["CVE-2026-10723","CVE-2026-10822","CVE-2026-11331","CVE-2026-11605","CVE-2026-11622","CVE-2026-11721","CVE-2026-12617","CVE-2026-13321"]},"timeline":[{"kind":"published","date":"2026-08-19T11:45:39.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-08-19T19:30:09.769Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":0,"level":"minimal","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T07:14:33.422Z","stale":false,"partial":false}}