{"schemaVersion":3,"id":"USN-7836-2","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"bind9 vulnerabilities\n\nUSN-7836-1 fixed vulnerabilities in Bind. This update provides the\ncorresponding fixes for Ubuntu 20.04 LTS.\n\nOriginal advisory details:\n\n Zuyao Xu and Xiang Li discovered that Bind incorrectly handled certain\n malformed DNSKEY records. A remote attacker could possibly use this issue\n to cause Bind to consume resources, resulting in a denial of service.\n (CVE-2025-8677)\n\n Yuxiao Wu, Yunyi Zhang, Baojun Liu, and Haixin Duan discovered that Bind\n incorrectly accepted certain records from answers. A remote attacker could\n possibly use this issue to perform a cache poisoning attack.\n (CVE-2025-40778)\n\n Amit Klein and Omer Ben Simhon discovered that Bind used a weak PRNG. A\n remote attacker could possibly use this issue to perform a cache poisoning\n attack. (CVE-2025-40780)","dates":{"published":"2025-11-12T15:42:46.000Z","modified":"2026-04-27T18:23:54.382Z","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":"< 1:9.18.30-0ubuntu0.20.04.2+esm1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1:9.18.30-0ubuntu0.20.04.2+esm1","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-7836-2","label":"ubuntu.com/security/notices/USN-7836-2","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2025-8677","label":"ubuntu.com/security/CVE-2025-8677","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2025-40778","label":"ubuntu.com/security/CVE-2025-40778","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2025-40780","label":"ubuntu.com/security/CVE-2025-40780","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2025-40778","CVE-2025-40780","CVE-2025-8677"],"downstream":[],"duplicates":[],"related":["CVE-2025-40778","CVE-2025-40780","CVE-2025-8677"]},"timeline":[{"kind":"published","date":"2025-11-12T15:42:46.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-04-27T18:23:54.382Z","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":"2026-10-20T03:59:28.616Z","stale":false,"partial":false}}