{"id":"USN-8474-1","summary":"NSD vulnerabilities","details":"It was discovered that NSD incorrectly handled APL resource records with an\naddress length larger than permitted for the address family. A remote attacker\ncould use this to cause a stack-based buffer overflow when the zone is written\nto disk, potentially executing arbitrary code with the privileges of the NSD\nserver. (CVE-2026-12246)\n\nIt was discovered that NSD incorrectly handled SVCB resource records. A remote\nattacker could use this to cause a heap overflow, potentially executing\narbitrary code with the privileges of the NSD server. This issue only affected\nUbuntu 26.04 LTS. (CVE-2026-12244)\n\nIt was discovered that NSD had a use-after-free vulnerability in TLS\nconnection error logging. A remote attacker could use this to cause a denial\nof service by crashing the server process. This issue only affected Ubuntu\n26.04 LTS. (CVE-2026-12245)\n\nIt was discovered that NSD incorrectly handled TLS authentication for zone\ntransfers. An attacker could bypass transfer security restrictions when\ncertain conditions were met. This issue only affected Ubuntu 26.04 LTS.\n(CVE-2026-12490)","modified":"2026-06-29T13:51:19.578110262Z","published":"2026-06-25T12:38:18Z","related":["UBUNTU-CVE-2026-12244","UBUNTU-CVE-2026-12245","UBUNTU-CVE-2026-12246","UBUNTU-CVE-2026-12490"],"upstream":["UBUNTU-CVE-2026-12244","UBUNTU-CVE-2026-12245","UBUNTU-CVE-2026-12246","UBUNTU-CVE-2026-12490"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8474-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-12244"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-12245"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-12246"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-12490"}],"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":{"binaries":[{"binary_version":"4.1.7-1ubuntu0.1~esm1","binary_name":"nsd"},{"binary_version":"4.1.7-1ubuntu0.1~esm1","binary_name":"nsd3"}],"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-8474-1.json","cves_map":{"cves":[{"id":"CVE-2026-12246","severity":[{"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_V4"},{"score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:Pro:16.04:LTS"}}},{"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_version":"4.1.17-1ubuntu0.1~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/usn/USN-8474-1.json","cves_map":{"cves":[{"id":"CVE-2026-12246","severity":[{"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_V4"},{"score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:Pro:18.04:LTS"}}},{"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_version":"4.1.26-1ubuntu0.1~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/usn/USN-8474-1.json","cves_map":{"cves":[{"id":"CVE-2026-12246","severity":[{"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_V4"},{"score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:Pro:20.04:LTS"}}},{"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/usn/USN-8474-1.json","cves_map":{"cves":[{"id":"CVE-2026-12246","severity":[{"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_V4"},{"score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:Pro:22.04:LTS"}}},{"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":{"binaries":[{"binary_version":"4.8.0-1ubuntu0.1~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/usn/USN-8474-1.json","cves_map":{"cves":[{"id":"CVE-2026-12246","severity":[{"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_V4"},{"score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:Pro:24.04:LTS"}}},{"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":{"binaries":[{"binary_version":"4.14.0-1ubuntu0.1~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/usn/USN-8474-1.json","cves_map":{"cves":[{"id":"CVE-2026-12244","severity":[{"score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","type":"CVSS_V4"},{"score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2026-12245","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","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-2026-12246","severity":[{"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_V4"},{"score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2026-12490","severity":[{"score":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","type":"CVSS_V4"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:Pro:26.04:LTS"}}}],"schema_version":"1.7.5"}