{"id":"USN-8696-1","summary":"bind9 vulnerability","details":"It was discovered that Bind incorrectly handled DNSSEC validation when a\ndomain was covered by both NSEC and NSEC3 records with only one type having\nan RRSIG. A remote attacker could possibly use this issue to cause Bind to\ncrash, resulting in a denial of service.","modified":"2026-08-31T17:26:23.158193858Z","published":"2026-08-31T11:32:15Z","related":["UBUNTU-CVE-2026-13204"],"upstream":["CVE-2026-13204","UBUNTU-CVE-2026-13204"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8696-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-13204"}],"affected":[{"package":{"name":"bind9","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/bind9?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:9.18.39-0ubuntu0.22.04.6"}]}],"versions":["1:9.16.15-1ubuntu1","1:9.16.15-1ubuntu2","1:9.16.15-1ubuntu3","1:9.18.0-2ubuntu1","1:9.18.0-2ubuntu2","1:9.18.0-2ubuntu3","1:9.18.1-1ubuntu1","1:9.18.1-1ubuntu1.1","1:9.18.1-1ubuntu1.2","1:9.18.1-1ubuntu1.3","1:9.18.12-0ubuntu0.22.04.1","1:9.18.12-0ubuntu0.22.04.2","1:9.18.12-0ubuntu0.22.04.3","1:9.18.18-0ubuntu0.22.04.1","1:9.18.18-0ubuntu0.22.04.2","1:9.18.24-0ubuntu0.22.04.1","1:9.18.28-0ubuntu0.22.04.1","1:9.18.30-0ubuntu0.22.04.1","1:9.18.30-0ubuntu0.22.04.2","1:9.18.39-0ubuntu0.22.04.1","1:9.18.39-0ubuntu0.22.04.2","1:9.18.39-0ubuntu0.22.04.3","1:9.18.39-0ubuntu0.22.04.4","1:9.18.39-0ubuntu0.22.04.5"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"bind9","binary_version":"1:9.18.39-0ubuntu0.22.04.6"},{"binary_name":"bind9-dnsutils","binary_version":"1:9.18.39-0ubuntu0.22.04.6"},{"binary_name":"bind9-host","binary_version":"1:9.18.39-0ubuntu0.22.04.6"},{"binary_name":"bind9-libs","binary_version":"1:9.18.39-0ubuntu0.22.04.6"},{"binary_name":"bind9-utils","binary_version":"1:9.18.39-0ubuntu0.22.04.6"},{"binary_name":"bind9utils","binary_version":"1:9.18.39-0ubuntu0.22.04.6"},{"binary_version":"1:9.18.39-0ubuntu0.22.04.6","binary_name":"dnsutils"}]},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2026-13204","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"type":"Ubuntu","score":"medium"}]}],"ecosystem":"Ubuntu:22.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8696-1.json"}},{"package":{"name":"bind9","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/bind9?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:9.18.39-0ubuntu0.24.04.7"}]}],"versions":["1:9.18.18-0ubuntu2","1:9.18.21-0ubuntu1","1:9.18.24-0ubuntu3","1:9.18.24-0ubuntu4","1:9.18.24-0ubuntu5","1:9.18.28-0ubuntu0.24.04.1","1:9.18.30-0ubuntu0.24.04.1","1:9.18.30-0ubuntu0.24.04.2","1:9.18.39-0ubuntu0.24.04.1","1:9.18.39-0ubuntu0.24.04.2","1:9.18.39-0ubuntu0.24.04.3","1:9.18.39-0ubuntu0.24.04.5","1:9.18.39-0ubuntu0.24.04.6"],"ecosystem_specific":{"binaries":[{"binary_version":"1:9.18.39-0ubuntu0.24.04.7","binary_name":"bind9"},{"binary_name":"bind9-dnsutils","binary_version":"1:9.18.39-0ubuntu0.24.04.7"},{"binary_name":"bind9-host","binary_version":"1:9.18.39-0ubuntu0.24.04.7"},{"binary_version":"1:9.18.39-0ubuntu0.24.04.7","binary_name":"bind9-libs"},{"binary_version":"1:9.18.39-0ubuntu0.24.04.7","binary_name":"bind9-utils"},{"binary_name":"bind9utils","binary_version":"1:9.18.39-0ubuntu0.24.04.7"},{"binary_version":"1:9.18.39-0ubuntu0.24.04.7","binary_name":"dnsutils"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8696-1.json","cves_map":{"cves":[{"id":"CVE-2026-13204","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:24.04:LTS"}}},{"package":{"name":"bind9","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/bind9?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:9.20.24-1ubuntu0.3"}]}],"versions":["1:9.20.11-1ubuntu2","1:9.20.11-1ubuntu3","1:9.20.18-1ubuntu1","1:9.20.18-1ubuntu2","1:9.20.18-1ubuntu2.1","1:9.20.24-1ubuntu0.1","1:9.20.24-1ubuntu0.2"],"ecosystem_specific":{"binaries":[{"binary_name":"bind9","binary_version":"1:9.20.24-1ubuntu0.3"},{"binary_name":"bind9-dnsutils","binary_version":"1:9.20.24-1ubuntu0.3"},{"binary_name":"bind9-host","binary_version":"1:9.20.24-1ubuntu0.3"},{"binary_version":"1:9.20.24-1ubuntu0.3","binary_name":"bind9-libs"},{"binary_name":"bind9-utils","binary_version":"1:9.20.24-1ubuntu0.3"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:26.04:LTS","cves":[{"id":"CVE-2026-13204","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"score":"medium","type":"Ubuntu"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8696-1.json"}}],"schema_version":"1.9.0"}