{"id":"UBUNTU-CVE-2026-13002","details":"A flow has been identified into dnssec.c library, causing an infinite loop to dnsmasq service. An attacker who controls any DNSSEC-signed zone can hang the dnsmasq process with a single crafted response, killing all DNS resolution for its clients.","modified":"2026-09-02T07:45:04.369972091Z","published":"2026-08-14T16:16:00Z","upstream":["CVE-2026-13002"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-13002"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-13002"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-13002"}],"affected":[{"package":{"name":"dnsmasq","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/dnsmasq?arch=source&distro=esm-infra-legacy%2Ftrusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.66-4ubuntu1","2.67-1","2.68-1","2.68-1ubuntu0.1","2.68-1ubuntu0.2","2.68-1ubuntu0.2+esm1","2.68-1ubuntu0.2+esm2","2.68-1ubuntu0.2+esm3","2.68-1ubuntu0.2+esm5","2.68-1ubuntu0.2+esm6"],"ecosystem_specific":{"binaries":[{"binary_name":"dnsmasq","binary_version":"2.68-1ubuntu0.2+esm6"},{"binary_version":"2.68-1ubuntu0.2+esm6","binary_name":"dnsmasq-base"},{"binary_version":"2.68-1ubuntu0.2+esm6","binary_name":"dnsmasq-utils"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-13002.json"}},{"package":{"name":"dnsmasq","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/dnsmasq?arch=source&distro=esm-infra-legacy%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.75-1","2.75-1ubuntu0.16.04.1","2.75-1ubuntu0.16.04.2","2.75-1ubuntu0.16.04.3","2.75-1ubuntu0.16.04.4","2.75-1ubuntu0.16.04.5","2.75-1ubuntu0.16.04.7","2.75-1ubuntu0.16.04.8","2.75-1ubuntu0.16.04.10","2.75-1ubuntu0.16.04.10+esm1","2.79-1ubuntu0.16.04.1+esm1","2.79-1ubuntu0.16.04.1+esm2","2.90-0ubuntu0.16.04.1+esm1","2.90-0ubuntu0.16.04.1+esm3","2.90-0ubuntu0.16.04.1+esm4"],"ecosystem_specific":{"binaries":[{"binary_name":"dnsmasq","binary_version":"2.90-0ubuntu0.16.04.1+esm4"},{"binary_name":"dnsmasq-base","binary_version":"2.90-0ubuntu0.16.04.1+esm4"},{"binary_name":"dnsmasq-base-lua","binary_version":"2.90-0ubuntu0.16.04.1+esm4"},{"binary_name":"dnsmasq-utils","binary_version":"2.90-0ubuntu0.16.04.1+esm4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-13002.json"}},{"package":{"name":"dnsmasq","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/dnsmasq?arch=source&distro=esm-infra%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.78-1","2.78-3","2.79-1","2.79-1ubuntu0.2","2.79-1ubuntu0.3","2.79-1ubuntu0.4","2.79-1ubuntu0.5","2.79-1ubuntu0.6","2.79-1ubuntu0.7","2.90-0ubuntu0.18.04.1+esm1","2.90-0ubuntu0.18.04.1+esm3","2.90-0ubuntu0.18.04.1+esm4"],"ecosystem_specific":{"binaries":[{"binary_version":"2.90-0ubuntu0.18.04.1+esm4","binary_name":"dnsmasq"},{"binary_name":"dnsmasq-base","binary_version":"2.90-0ubuntu0.18.04.1+esm4"},{"binary_version":"2.90-0ubuntu0.18.04.1+esm4","binary_name":"dnsmasq-base-lua"},{"binary_version":"2.90-0ubuntu0.18.04.1+esm4","binary_name":"dnsmasq-utils"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-13002.json"}},{"package":{"name":"dnsmasq","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/dnsmasq?arch=source&distro=esm-infra%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.80-1ubuntu2","2.80-1ubuntu4","2.80-1.1ubuntu1","2.80-1.1ubuntu1.2","2.80-1.1ubuntu1.3","2.80-1.1ubuntu1.4","2.80-1.1ubuntu1.5","2.80-1.1ubuntu1.6","2.80-1.1ubuntu1.7","2.90-0ubuntu0.20.04.1","2.90-0ubuntu0.20.04.1+esm2","2.90-0ubuntu0.20.04.1+esm3"],"ecosystem_specific":{"binaries":[{"binary_version":"2.90-0ubuntu0.20.04.1+esm3","binary_name":"dnsmasq"},{"binary_name":"dnsmasq-base","binary_version":"2.90-0ubuntu0.20.04.1+esm3"},{"binary_name":"dnsmasq-base-lua","binary_version":"2.90-0ubuntu0.20.04.1+esm3"},{"binary_name":"dnsmasq-utils","binary_version":"2.90-0ubuntu0.20.04.1+esm3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-13002.json"}},{"package":{"name":"dnsmasq","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/dnsmasq?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.85-1ubuntu2","2.86-1.1","2.86-1.1ubuntu0.1","2.86-1.1ubuntu0.2","2.86-1.1ubuntu0.3","2.86-1.1ubuntu0.4","2.86-1.1ubuntu0.5","2.90-0ubuntu0.22.04.1","2.90-0ubuntu0.22.04.3","2.90-0ubuntu0.22.04.4","2.91-0ubuntu0.22.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"dnsmasq","binary_version":"2.91-0ubuntu0.22.04.1"},{"binary_version":"2.91-0ubuntu0.22.04.1","binary_name":"dnsmasq-base"},{"binary_version":"2.91-0ubuntu0.22.04.1","binary_name":"dnsmasq-base-lua"},{"binary_version":"2.91-0ubuntu0.22.04.1","binary_name":"dnsmasq-utils"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-13002.json"}},{"package":{"name":"dnsmasq","ecosystem"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