{"schemaVersion":3,"id":"USN-8282-2","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"unbound vulnerabilities\n\nUSN-8282-1 fixed vulnerabilities in Unbound. This update provides the\ncorresponding updates for CVE-2026-41292 in Ubuntu 18.04 LTS and Ubuntu\n20.04 LTS and CVE-2026-42959, CVE-2026-42960 in Ubuntu 14.04 LTS, Ubuntu\n16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS.\n\nOriginal advisory details:\n\n Andrew Griffiths discovered that Unbound did not properly handle certain\n DNSCrypt packets. A remote attacker could possibly use this issue to cause\n Unbound to crash, resulting in a denial of service. (CVE-2026-32792)\n\n Qifan Zhang discovered that Unbound incorrectly handled DNSSEC validation\n in certain situations. A remote attacker could possibly use this issue to\n execute arbitrary code. This issue only affected Ubuntu 24.04 LTS,  Ubuntu\n 25.10, and Ubuntu 26.04 LTS. (CVE-2026-33278)\n\n Qifan Zhang discovered that Unbound incorrectly handled certain ghost\n domain name records. A remote attacker could possibly use this issue to\n cause a denial of service. This issue only affected Ubuntu 24.04 LTS,\n Ubuntu 25.10, and Ubuntu 26.04 LTS. (CVE-2026-40622)\n\n Qifan Zhang discovered that Unbound did not properly limit processing of\n long EDNS option lists. A remote attacker could possibly use this issue to\n cause Unbound to use excessive resources, leading to a denial of service.\n (CVE-2026-41292)\n\n Qifan Zhang discovered that Unbound incorrectly handled jostle logic under\n certain circumstances. A remote attacker could possibly use this issue to\n cause Unbound to use excessive resources, leading to a denial of service.\n (CVE-2026-42534)\n\n Qifan Zhang discovered that Unbound did not properly bound NSEC3 hash\n calculations. A remote attacker could possibly use this issue to cause\n Unbound to use excessive resources, leading to a denial of service.\n (CVE-2026-42923)\n\n Qifan Zhang discovered that Unbound incorrectly handled multiple EDNS\n options in certain situations. A remote attacker could possibly use this\n issue to cause Unbound to crash, resulting in a denial of service, or\n execute arbitrary code. This issue only affected Ubuntu 24.04 LTS,  Ubuntu\n 25.10, and Ubuntu 26.04 LTS. (CVE-2026-42944)\n\n Qifan Zhang discovered that Unbound incorrectly handled DNSSEC validation\n of malicious content. A remote attacker could possibly use this issue to\n cause Unbound to crash, resulting in a denial of service.\n (CVE-2026-42959)\n\n TaoFei Guo, Yang Luo, and JianJun Chen discovered that Unbound\n incorrectly handled delegation processing in certain situations. A remote\n attacker could possibly use this issue to poison the DNS cache and obtain\n sensitive information. (CVE-2026-42960)\n\n Qifan Zhang discovered that Unbound did not properly bound name\n compression in certain cases. A remote attacker could possibly use this\n issue to cause Unbound to use excessive resources, leading to a denial of\n service. (CVE-2026-44390)\n\n Qifan Zhang discovered that Unbound had a use-after-free issue in RPZ\n handling. A remote attacker could possibly use this issue to cause Unbound\n to crash, resulting in a denial of service, or execute arbitrary code.\n This issue only affected Ubuntu 24.04 LTS, Ubuntu 25.10, and Ubuntu 26.04\n LTS. (CVE-2026-44608)","dates":{"published":"2026-06-02T18:26:07.000Z","modified":"2026-06-30T18:16:15.710Z","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":"unbound","name":"unbound","label":"unbound","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/unbound","purlType":"deb","versions":[{"text":"< 1.4.22-1ubuntu4.14.04.3+esm3","noFixRecorded":false,"fixedIn":null},{"text":"< 1.5.8-1ubuntu1.1+esm3","noFixRecorded":false,"fixedIn":null},{"text":"< 1.6.7-1ubuntu2.6+esm4","noFixRecorded":false,"fixedIn":null},{"text":"< 1.9.4-2ubuntu1.11+esm1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.4.22-1ubuntu4.14.04.3+esm3 | < 1.5.8-1ubuntu1.1+esm3 | < 1.6.7-1ubuntu2.6+esm4 | < 1.9.4-2ubuntu1.11+esm1","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-8282-2","label":"ubuntu.com/security/notices/USN-8282-2","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-41292","label":"ubuntu.com/security/CVE-2026-41292","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-42959","label":"ubuntu.com/security/CVE-2026-42959","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-42960","label":"ubuntu.com/security/CVE-2026-42960","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":["CVE-2026-41292","CVE-2026-42959","CVE-2026-42960"]},"timeline":[{"kind":"published","date":"2026-06-02T18:26:07.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-06-30T18:16:15.710Z","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":"2026-10-20T04:49:37.831Z","stale":false,"partial":false}}