{"id":"UBUNTU-CVE-2026-12246","details":"NSD version 4.14.0 introduced a bug where a specially crafted APL RR, with an adflength larger than permitted for the address family will overwrite the stack when the zone is written to disk, with a maximum of 111 attacker controlled bytes.","modified":"2026-06-29T13:56:27.130983244Z","published":"2026-06-25T00:00:00Z","related":["USN-8474-1"],"upstream":["CVE-2026-12246"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-12246"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8474-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-12246"}],"affected":[{"package":{"name":"nsd","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/nsd?arch=source&distro=esm-apps-legacy%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.7-1ubuntu0.1~esm1"}]}],"versions":["4.1.2-1","4.1.6-1","4.1.7-1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro","binaries":[{"binary_name":"nsd","binary_version":"4.1.7-1ubuntu0.1~esm1"},{"binary_version":"4.1.7-1ubuntu0.1~esm1","binary_name":"nsd3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12246.json"}},{"package":{"name":"nsd","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/nsd?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.17-1ubuntu0.1~esm1"}]}],"versions":["4.1.16-1build1","4.1.17-1","4.1.17-1build1"],"ecosystem_specific":{"binaries":[{"binary_name":"nsd","binary_version":"4.1.17-1ubuntu0.1~esm1"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12246.json"}},{"package":{"name":"nsd","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/nsd?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.26-1ubuntu0.1~esm1"}]}],"versions":["4.1.26-1","4.1.26-1build1"],"ecosystem_specific":{"binaries":[{"binary_name":"nsd","binary_version":"4.1.26-1ubuntu0.1~esm1"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12246.json"}},{"package":{"name":"nsd","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/nsd?arch=source&distro=esm-apps%2Fjammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.9-1ubuntu0.1~esm1"}]}],"versions":["4.3.5-1","4.3.7-1","4.3.8-1","4.3.8-1build1","4.3.9-1"],"ecosystem_specific":{"binaries":[{"binary_version":"4.3.9-1ubuntu0.1~esm1","binary_name":"nsd"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12246.json"}},{"package":{"name":"nsd","ecosystem":"Ubuntu:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/nsd?arch=source&distro=esm-apps%2Fnoble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.8.0-1ubuntu0.1~esm1"}]}],"versions":["4.7.0-1","4.8.0-1","4.8.0-1build1","4.8.0-1build3"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"nsd","binary_version":"4.8.0-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12246.json"}},{"package":{"name":"nsd","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/nsd?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.11.1-1","4.12.0-1"],"ecosystem_specific":{"binaries":[{"binary_name":"nsd","binary_version":"4.12.0-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12246.json"}},{"package":{"name":"nsd","ecosystem":"Ubuntu:Pro:26.04:LTS","purl":"pkg:deb/ubuntu/nsd?arch=source&distro=esm-apps%2Fresolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.14.0-1ubuntu0.1~esm1"}]}],"versions":["4.12.0-1","4.13.0-6","4.14.0-1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"nsd","binary_version":"4.14.0-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12246.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}