{"id":"UBUNTU-CVE-2026-40719","details":"Deadwood in MaraDNS 3.5.0036 allows attackers to exhaust connection slots via a zone whose authoritative nameserver address cannot be resolved.","modified":"2026-05-14T14:42:54.792790Z","published":"2026-04-15T07:16:00Z","upstream":["CVE-2026-40719"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-40719"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-40719"},{"type":"REPORT","url":"https://github.com/samboy/MaraDNS/security/advisories/GHSA-cfc6-vhrv-62cj"}],"affected":[{"package":{"name":"maradns","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/maradns@2.0.13-1ubuntu0.1~esm1?arch=source&distro=esm-apps/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.11-1","2.0.13-1","2.0.13-1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"duende","binary_version":"2.0.13-1ubuntu0.1~esm1"},{"binary_name":"maradns","binary_version":"2.0.13-1ubuntu0.1~esm1"},{"binary_version":"2.0.13-1ubuntu0.1~esm1","binary_name":"maradns-deadwood"},{"binary_name":"maradns-docs","binary_version":"2.0.13-1ubuntu0.1~esm1"},{"binary_name":"maradns-zoneserver","binary_version":"2.0.13-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40719.json"}},{"package":{"name":"maradns","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/maradns@2.0.13-1.2ubuntu0.1~esm1?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.13-1.2","2.0.13-1.2ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"duende","binary_version":"2.0.13-1.2ubuntu0.1~esm1"},{"binary_name":"maradns","binary_version":"2.0.13-1.2ubuntu0.1~esm1"},{"binary_name":"maradns-deadwood","binary_version":"2.0.13-1.2ubuntu0.1~esm1"},{"binary_name":"maradns-docs","binary_version":"2.0.13-1.2ubuntu0.1~esm1"},{"binary_name":"maradns-zoneserver","binary_version":"2.0.13-1.2ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40719.json"}},{"package":{"name":"maradns","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/maradns@2.0.13-1.4+deb11u1build0.20.04.1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.13-1.2build1","2.0.13-1.4","2.0.13-1.4build1","2.0.13-1.4+deb11u1build0.20.04.1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.0.13-1.4+deb11u1build0.20.04.1","binary_name":"duende"},{"binary_name":"maradns","binary_version":"2.0.13-1.4+deb11u1build0.20.04.1"},{"binary_name":"maradns-deadwood","binary_version":"2.0.13-1.4+deb11u1build0.20.04.1"},{"binary_name":"maradns-docs","binary_version":"2.0.13-1.4+deb11u1build0.20.04.1"},{"binary_name":"maradns-zoneserver","binary_version":"2.0.13-1.4+deb11u1build0.20.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40719.json"}},{"package":{"name":"maradns","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/maradns@2.0.13-1.4+deb11u1build0.22.04.1?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.13-1.4build2","2.0.13-1.4+deb11u1build0.22.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"duende","binary_version":"2.0.13-1.4+deb11u1build0.22.04.1"},{"binary_name":"maradns","binary_version":"2.0.13-1.4+deb11u1build0.22.04.1"},{"binary_name":"maradns-deadwood","binary_version":"2.0.13-1.4+deb11u1build0.22.04.1"},{"binary_name":"maradns-docs","binary_version":"2.0.13-1.4+deb11u1build0.22.04.1"},{"binary_name":"maradns-zoneserver","binary_version":"2.0.13-1.4+deb11u1build0.22.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40719.json"}},{"package":{"name":"maradns","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/maradns@2.0.13-1.6?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.13-1.4ubuntu1","2.0.13-1.5","2.0.13-1.6"],"ecosystem_specific":{"binaries":[{"binary_name":"duende","binary_version":"2.0.13-1.6"},{"binary_name":"maradns","binary_version":"2.0.13-1.6"},{"binary_name":"maradns-deadwood","binary_version":"2.0.13-1.6"},{"binary_name":"maradns-docs","binary_version":"2.0.13-1.6"},{"binary_name":"maradns-zoneserver","binary_version":"2.0.13-1.6"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40719.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}