{"id":"USN-8449-1","summary":"ldns vulnerability","details":"Pablo Ruiz discovered that ldns did not properly validate DNS\nresponses when used as a stub resolver over UDP. A remote\nattacker could possibly use this issue to inject arbitrary DNS\nresponses.","modified":"2026-06-22T09:32:19.771598159Z","published":"2026-06-18T13:33:51Z","related":["UBUNTU-CVE-2026-10846"],"upstream":["UBUNTU-CVE-2026-10846"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8449-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-10846"}],"affected":[{"package":{"name":"ldns","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/ldns?arch=source&distro=esm-infra-legacy%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.17-8ubuntu0.1+esm2"}]}],"versions":["1.6.17-5","1.6.17-7","1.6.17-8","1.6.17-8ubuntu0.1","1.6.17-8ubuntu0.1+esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.6.17-8ubuntu0.1+esm2","binary_name":"ldnsutils"},{"binary_version":"1.6.17-8ubuntu0.1+esm2","binary_name":"libldns1"},{"binary_version":"1.6.17-8ubuntu0.1+esm2","binary_name":"python-ldns"}],"availability":"Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8449-1.json","cves_map":{"ecosystem":"Ubuntu:Pro:16.04:LTS","cves":[{"id":"CVE-2026-10846","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"type":"Ubuntu","score":"high"}]}]}}},{"package":{"name":"ldns","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/ldns?arch=source&distro=esm-infra%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.7.0-3ubuntu4.1+esm1"}]}],"versions":["1.7.0-1ubuntu1","1.7.0-3ubuntu1","1.7.0-3ubuntu2","1.7.0-3ubuntu4","1.7.0-3ubuntu4.1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.7.0-3ubuntu4.1+esm1","binary_name":"ldnsutils"},{"binary_version":"1.7.0-3ubuntu4.1+esm1","binary_name":"libldns2"},{"binary_version":"1.7.0-3ubuntu4.1+esm1","binary_name":"python-ldns"},{"binary_version":"1.7.0-3ubuntu4.1+esm1","binary_name":"python3-ldns"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8449-1.json","cves_map":{"ecosystem":"Ubuntu:Pro:18.04:LTS","cves":[{"id":"CVE-2026-10846","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"type":"Ubuntu","score":"high"}]}]}}},{"package":{"name":"ldns","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/ldns?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.7.0-4.1ubuntu1+esm2"}]}],"versions":["1.7.0-3ubuntu8","1.7.0-4","1.7.0-4ubuntu1","1.7.0-4.1ubuntu1","1.7.0-4.1ubuntu1+esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.7.0-4.1ubuntu1+esm2","binary_name":"ldnsutils"},{"binary_version":"1.7.0-4.1ubuntu1+esm2","binary_name":"libldns2"},{"binary_version":"1.7.0-4.1ubuntu1+esm2","binary_name":"python-ldns"},{"binary_version":"1.7.0-4.1ubuntu1+esm2","binary_name":"python3-ldns"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8449-1.json","cves_map":{"ecosystem":"Ubuntu:Pro:20.04:LTS","cves":[{"id":"CVE-2026-10846","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"type":"Ubuntu","score":"high"}]}]}}},{"package":{"name":"ldns","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/ldns?arch=source&distro=esm-apps%2Fjammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.7.1-2ubuntu4+esm2"}]}],"versions":["1.7.1-2build1","1.7.1-2ubuntu1","1.7.1-2ubuntu3","1.7.1-2ubuntu4","1.7.1-2ubuntu4+esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.7.1-2ubuntu4+esm2","binary_name":"ldnsutils"},{"binary_version":"1.7.1-2ubuntu4+esm2","binary_name":"libldns3"},{"binary_version":"1.7.1-2ubuntu4+esm2","binary_name":"python3-ldns"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8449-1.json","cves_map":{"ecosystem":"Ubuntu:Pro:22.04:LTS","cves":[{"id":"CVE-2026-10846","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"type":"Ubuntu","score":"high"}]}]}}},{"package":{"name":"ldns","ecosystem":"Ubuntu:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/ldns?arch=source&distro=esm-apps%2Fnoble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.3-2ubuntu0.1~esm1"}]}],"versions":["1.8.3-1build1","1.8.3-1build2","1.8.3-2","1.8.3-2build1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.8.3-2ubuntu0.1~esm1","binary_name":"ldnsutils"},{"binary_version":"1.8.3-2ubuntu0.1~esm1","binary_name":"libldns3t64"},{"binary_version":"1.8.3-2ubuntu0.1~esm1","binary_name":"python3-ldns"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8449-1.json","cves_map":{"ecosystem":"Ubuntu:Pro:24.04:LTS","cves":[{"id":"CVE-2026-10846","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"type":"Ubuntu","score":"high"}]}]}}},{"package":{"name":"ldns","ecosystem":"Ubuntu:Pro:26.04:LTS","purl":"pkg:deb/ubuntu/ldns?arch=source&distro=esm-apps%2Fresolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.4-2ubuntu0.26.04.1~esm1"}]}],"versions":["1.8.4-2build1","1.8.4-2build3"],"ecosystem_specific":{"binaries":[{"binary_version":"1.8.4-2ubuntu0.26.04.1~esm1","binary_name":"ldnsutils"},{"binary_version":"1.8.4-2ubuntu0.26.04.1~esm1","binary_name":"libldns3t64"},{"binary_version":"1.8.4-2ubuntu0.26.04.1~esm1","binary_name":"python3-ldns"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8449-1.json","cves_map":{"ecosystem":"Ubuntu:Pro:26.04:LTS","cves":[{"id":"CVE-2026-10846","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"type":"Ubuntu","score":"high"}]}]}}}],"schema_version":"1.7.5"}