{"id":"USN-8282-1","summary":"unbound vulnerabilities","details":"Andrew Griffiths discovered that Unbound did not properly handle certain\nDNSCrypt packets. A remote attacker could possibly use this issue to cause\nUnbound to crash, resulting in a denial of service. (CVE-2026-32792)\n\nQifan Zhang discovered that Unbound incorrectly handled DNSSEC validation\nin certain situations. A remote attacker could possibly use this issue to\nexecute arbitrary code. This issue only affected Ubuntu 24.04 LTS,\nUbuntu 25.10, and Ubuntu 26.04 LTS. (CVE-2026-33278)\n\nQifan Zhang discovered that Unbound incorrectly handled certain ghost\ndomain name records. A remote attacker could possibly use this issue to\ncause a denial of service. This issue only affected Ubuntu 24.04 LTS,\nUbuntu 25.10, and Ubuntu 26.04 LTS. (CVE-2026-40622)\n\nQifan Zhang discovered that Unbound did not properly limit processing of\nlong EDNS option lists. A remote attacker could possibly use this issue to\ncause Unbound to use excessive resources, leading to a denial of service.\n(CVE-2026-41292)\n\nQifan Zhang discovered that Unbound incorrectly handled jostle logic under\ncertain circumstances. A remote attacker could possibly use this issue to\ncause Unbound to use excessive resources, leading to a denial of service.\n(CVE-2026-42534)\n\nQifan Zhang discovered that Unbound did not properly bound NSEC3 hash\ncalculations. A remote attacker could possibly use this issue to cause\nUnbound to use excessive resources, leading to a denial of service.\n(CVE-2026-42923)\n\nQifan Zhang discovered that Unbound incorrectly handled multiple EDNS\noptions in certain situations. A remote attacker could possibly use this\nissue to cause Unbound to crash, resulting in a denial of service, or\nexecute arbitrary code. This issue only affected Ubuntu 24.04 LTS,\nUbuntu 25.10, and Ubuntu 26.04 LTS. (CVE-2026-42944)\n\nQifan Zhang discovered that Unbound incorrectly handled DNSSEC validation\nof malicious content. A remote attacker could possibly use this issue to\ncause Unbound to crash, resulting in a denial of service.\n(CVE-2026-42959)\n\nTaoFei Guo, Yang Luo, and JianJun Chen discovered that Unbound\nincorrectly handled delegation processing in certain situations. A remote\nattacker could possibly use this issue to poison the DNS cache and obtain\nsensitive information. (CVE-2026-42960)\n\nQifan Zhang discovered that Unbound did not properly bound name\ncompression in certain cases. A remote attacker could possibly use this\nissue to cause Unbound to use excessive resources, leading to a denial of\nservice. (CVE-2026-44390)\n\nQifan Zhang discovered that Unbound had a use-after-free issue in RPZ\nhandling. A remote attacker could possibly use this issue to cause Unbound\nto crash, resulting in a denial of service, or execute arbitrary code.\nThis issue only affected Ubuntu 24.04 LTS, Ubuntu 25.10, and Ubuntu 26.04\nLTS. (CVE-2026-44608)","modified":"2026-05-27T19:15:15.940613699Z","published":"2026-05-20T12:20:50Z","related":["UBUNTU-CVE-2026-32792","UBUNTU-CVE-2026-33278","UBUNTU-CVE-2026-40622","UBUNTU-CVE-2026-41292","UBUNTU-CVE-2026-42534","UBUNTU-CVE-2026-42923","UBUNTU-CVE-2026-42944","UBUNTU-CVE-2026-42959","UBUNTU-CVE-2026-42960","UBUNTU-CVE-2026-44390","UBUNTU-CVE-2026-44608"],"upstream":["UBUNTU-CVE-2026-32792","UBUNTU-CVE-2026-33278","UBUNTU-CVE-2026-40622","UBUNTU-CVE-2026-41292","UBUNTU-CVE-2026-42534","UBUNTU-CVE-2026-42923","UBUNTU-CVE-2026-42944","UBUNTU-CVE-2026-42959","UBUNTU-CVE-2026-42960","UBUNTU-CVE-2026-44390","UBUNTU-CVE-2026-44608"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8282-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-32792"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-33278"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-40622"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-41292"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-42534"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-42923"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-42944"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-42959"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-42960"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-44390"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-44608"}],"affected":[{"package":{"name":"unbound","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/unbound?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.13.1-1ubuntu5.15"}]}],"versions":["1.13.1-1ubuntu1","1.13.1-1ubuntu3","1.13.1-1ubuntu5","1.13.1-1ubuntu5.1","1.13.1-1ubuntu5.2","1.13.1-1ubuntu5.3","1.13.1-1ubuntu5.4","1.13.1-1ubuntu5.5","1.13.1-1ubuntu5.7","1.13.1-1ubuntu5.8","1.13.1-1ubuntu5.10","1.13.1-1ubuntu5.11","1.13.1-1ubuntu5.12","1.13.1-1ubuntu5.13","1.13.1-1ubuntu5.14"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"1.13.1-1ubuntu5.15","binary_name":"libunbound8"},{"binary_version":"1.13.1-1ubuntu5.15","binary_name":"python3-unbound"},{"binary_version":"1.13.1-1ubuntu5.15","binary_name":"unbound"},{"binary_version":"1.13.1-1ubuntu5.15","binary_name":"unbound-anchor"},{"binary_version":"1.13.1-1ubuntu5.15","binary_name":"unbound-host"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8282-1.json","cves_map":{"cves":[{"severity":[{"score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green","type":"CVSS_V4"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-32792"},{"severity":[{"score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Red","type":"CVSS_V4"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-41292"},{"severity":[{"score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/U:Amber","type":"CVSS_V4"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-42534"},{"severity":[{"score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/U:Amber","type":"CVSS_V4"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-42923"},{"severity":[{"score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/U:Red","type":"CVSS_V4"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-42959"},{"severity":[{"score":"CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:H/E:P/U:Amber","type":"CVSS_V4"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-42960"},{"severity":[{"score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/U:Amber","type":"CVSS_V4"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-44390"}],"ecosystem":"Ubuntu:22.04:LTS"}}},{"package":{"name":"unbound","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/unbound?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.19.2-1ubuntu3.8"}]}],"versions":["1.17.1-2","1.18.0-2ubuntu1","1.18.0-2ubuntu2","1.19.1-1ubuntu1","1.19.2-1ubuntu1","1.19.2-1ubuntu3","1.19.2-1ubuntu3.1","1.19.2-1ubuntu3.2","1.19.2-1ubuntu3.3","1.19.2-1ubuntu3.4","1.19.2-1ubuntu3.5","1.19.2-1ubuntu3.6","1.19.2-1ubuntu3.7"],"ecosystem_specific":{"availability":"No 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