{"id":"UBUNTU-CVE-2026-19720","details":"talkd buffer overflow with long DNS names","modified":"2026-09-11T20:50:16.403177827Z","published":"2026-08-17T00:00:00Z","upstream":["CVE-2026-19720"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-19720"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-19720"},{"type":"REPORT","url":"https://www.openwall.com/lists/oss-security/2026/07/25/3"}],"affected":[{"package":{"name":"inetutils","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/inetutils?arch=source&distro=esm-infra-legacy%2Ftrusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:1.9.1.306-0a482-1","2:1.9.1.363-bbc1-1","2:1.9.2-1","2:1.9.2-1ubuntu0.1~esm1","2:1.9.2-1ubuntu0.1~esm2","2:1.9.2-1ubuntu0.1~esm4"],"ecosystem_specific":{"binaries":[{"binary_name":"inetutils-ftp","binary_version":"2:1.9.2-1ubuntu0.1~esm4"},{"binary_name":"inetutils-ftpd","binary_version":"2:1.9.2-1ubuntu0.1~esm4"},{"binary_name":"inetutils-inetd","binary_version":"2:1.9.2-1ubuntu0.1~esm4"},{"binary_version":"2:1.9.2-1ubuntu0.1~esm4","binary_name":"inetutils-ping"},{"binary_name":"inetutils-syslogd","binary_version":"2:1.9.2-1ubuntu0.1~esm4"},{"binary_name":"inetutils-talk","binary_version":"2:1.9.2-1ubuntu0.1~esm4"},{"binary_name":"inetutils-talkd","binary_version":"2:1.9.2-1ubuntu0.1~esm4"},{"binary_name":"inetutils-telnet","binary_version":"2:1.9.2-1ubuntu0.1~esm4"},{"binary_version":"2:1.9.2-1ubuntu0.1~esm4","binary_name":"inetutils-telnetd"},{"binary_name":"inetutils-tools","binary_version":"2:1.9.2-1ubuntu0.1~esm4"},{"binary_version":"2:1.9.2-1ubuntu0.1~esm4","binary_name":"inetutils-traceroute"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-19720.json"}},{"package":{"name":"inetutils","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/inetutils?arch=source&distro=esm-apps-legacy%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:1.9.4-1","2:1.9.4-1build1","2:1.9.4-1ubuntu0.1~esm1","2:1.9.4-1ubuntu0.1~esm2","2:1.9.4-1ubuntu0.1~esm3","2:1.9.4-1ubuntu0.1~esm5","2:1.9.4-1ubuntu0.1~esm6"],"ecosystem_specific":{"binaries":[{"binary_version":"2:1.9.4-1ubuntu0.1~esm6","binary_name":"inetutils-ftp"},{"binary_name":"inetutils-ftpd","binary_version":"2:1.9.4-1ubuntu0.1~esm6"},{"binary_name":"inetutils-inetd","binary_version":"2:1.9.4-1ubuntu0.1~esm6"},{"binary_name":"inetutils-ping","binary_version":"2:1.9.4-1ubuntu0.1~esm6"},{"binary_name":"inetutils-syslogd","binary_version":"2:1.9.4-1ubuntu0.1~esm6"},{"binary_name":"inetutils-talk","binary_version":"2:1.9.4-1ubuntu0.1~esm6"},{"binary_name":"inetutils-talkd","binary_version":"2:1.9.4-1ubuntu0.1~esm6"},{"binary_name":"inetutils-telnet","binary_version":"2:1.9.4-1ubuntu0.1~esm6"},{"binary_name":"inetutils-telnetd","binary_version":"2:1.9.4-1ubuntu0.1~esm6"},{"binary_version":"2:1.9.4-1ubuntu0.1~esm6","binary_name":"inetutils-tools"},{"binary_name":"inetutils-traceroute","binary_version":"2:1.9.4-1ubuntu0.1~esm6"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-19720.json"}},{"package":{"name":"inetutils","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/inetutils?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:1.9.4-2build1","2:1.9.4-3","2:1.9.4-3ubuntu0.1","2:1.9.4-3ubuntu0.1+esm1","2:1.9.4-3ubuntu0.1+esm2","2:1.9.4-3ubuntu0.1+esm4","2:1.9.4-3ubuntu0.1+esm5"],"ecosystem_specific":{"binaries":[{"binary_name":"inetutils-ftp","binary_version":"2:1.9.4-3ubuntu0.1+esm5"},{"binary_name":"inetutils-ftpd","binary_version":"2:1.9.4-3ubuntu0.1+esm5"},{"binary_version":"2:1.9.4-3ubuntu0.1+esm5","binary_name":"inetutils-inetd"},{"binary_name":"inetutils-ping","binary_version":"2:1.9.4-3ubuntu0.1+esm5"},{"binary_version":"2:1.9.4-3ubuntu0.1+esm5","binary_name":"inetutils-syslogd"},{"binary_name":"inetutils-talk","binary_version":"2:1.9.4-3ubuntu0.1+esm5"},{"binary_name":"inetutils-talkd","binary_version":"2:1.9.4-3ubuntu0.1+esm5"},{"binary_version":"2:1.9.4-3ubuntu0.1+esm5","binary_name":"inetutils-telnet"},{"binary_name":"inetutils-telnetd","binary_version":"2:1.9.4-3ubuntu0.1+esm5"},{"binary_name":"inetutils-tools","binary_version":"2:1.9.4-3ubuntu0.1+esm5"},{"binary_name":"inetutils-traceroute","binary_version":"2:1.9.4-3ubuntu0.1+esm5"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-19720.json"}},{"package":{"name":"inetutils","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/inetutils?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:1.9.4-10build1","2:1.9.4-11","2:1.9.4-11ubuntu0.1","2:1.9.4-11ubuntu0.1+esm1","2:1.9.4-11ubuntu0.2","2:1.9.4-11ubuntu0.2+esm1","2:1.9.4-11ubuntu0.2+esm3","2:1.9.4-11ubuntu0.2+esm4"],"ecosystem_specific":{"binaries":[{"binary_name":"inetutils-ftp","binary_version":"2:1.9.4-11ubuntu0.2+esm4"},{"binary_version":"2:1.9.4-11ubuntu0.2+esm4","binary_name":"inetutils-ftpd"},{"binary_version":"2:1.9.4-11ubuntu0.2+esm4","binary_name":"inetutils-inetd"},{"binary_name":"inetutils-ping","binary_version":"2:1.9.4-11ubuntu0.2+esm4"},{"binary_name":"inetutils-syslogd","binary_version":"2:1.9.4-11ubuntu0.2+esm4"},{"binary_name":"inetutils-talk","binary_version":"2:1.9.4-11ubuntu0.2+esm4"},{"binary_version":"2:1.9.4-11ubuntu0.2+esm4","binary_name":"inetutils-talkd"},{"binary_name":"inetutils-telnet","binary_version":"2:1.9.4-11ubuntu0.2+esm4"},{"binary_version":"2:1.9.4-11ubuntu0.2+esm4","binary_name":"inetutils-telnetd"},{"binary_version":"2:1.9.4-11ubuntu0.2+esm4","binary_name":"inetutils-tools"},{"binary_name":"inetutils-traceroute","binary_version":"2:1.9.4-11ubuntu0.2+esm4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-19720.json"}},{"package":{"name":"inetutils","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/inetutils?arch=source&distro=esm-apps%2Fjammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:2.0-1","2:2.2-2","2:2.2-2ubuntu0.1","2:2.2-2ubuntu0.2","2:2.2-2ubuntu0.2+esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"2:2.2-2ubuntu0.2+esm1","binary_name":"inetutils-ftp"},{"binary_version":"2:2.2-2ubuntu0.2+esm1","binary_name":"inetutils-ftpd"},{"binary_name":"inetutils-inetd","binary_version":"2:2.2-2ubuntu0.2+esm1"},{"binary_version":"2:2.2-2ubuntu0.2+esm1","binary_name":"inetutils-ping"},{"binary_version":"2:2.2-2ubuntu0.2+esm1","binary_name":"inetutils-syslogd"},{"binary_name":"inetutils-talk","binary_version":"2:2.2-2ubuntu0.2+esm1"},{"binary_name":"inetutils-talkd","binary_version":"2:2.2-2ubuntu0.2+esm1"},{"binary_version":"2:2.2-2ubuntu0.2+esm1","binary_name":"inetutils-telnet"},{"binary_version":"2:2.2-2ubuntu0.2+esm1","binary_name":"inetutils-telnetd"},{"binary_name":"inetutils-tools","binary_version":"2:2.2-2ubuntu0.2+esm1"},{"binary_name":"inetutils-traceroute","binary_version":"2:2.2-2ubuntu0.2+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-19720.json"}},{"package":{"name":"inetutils","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/inetutils?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:2.4-2ubuntu2","2:2.4-3ubuntu1","2:2.5-3ubuntu1","2:2.5-3ubuntu3","2:2.5-3ubuntu4","2:2.5-3ubuntu4.1","2:2.5-3ubuntu4.2"],"ecosystem_specific":{"binaries":[{"binary_name":"inetutils-ftp","binary_version":"2:2.5-3ubuntu4.2"},{"binary_name":"inetutils-ftpd","binary_version":"2:2.5-3ubuntu4.2"},{"binary_name":"inetutils-inetd","binary_version":"2:2.5-3ubuntu4.2"},{"binary_name":"inetutils-ping","binary_version":"2:2.5-3ubuntu4.2"},{"binary_version":"2:2.5-3ubuntu4.2","binary_name":"inetutils-syslogd"},{"binary_name":"inetutils-talk","binary_version":"2:2.5-3ubuntu4.2"},{"binary_name":"inetutils-talkd","binary_version":"2:2.5-3ubuntu4.2"},{"binary_name":"inetutils-telnet","binary_version":"2:2.5-3ubuntu4.2"},{"binary_version":"2:2.5-3ubuntu4.2","binary_name":"inetutils-telnetd"},{"binary_name":"inetutils-tools","binary_version":"2:2.5-3ubuntu4.2"},{"binary_version":"2:2.5-3ubuntu4.2","binary_name":"inetutils-traceroute"},{"binary_name":"telnet","binary_version":"0.17+2.5-3ubuntu4.2"},{"binary_name":"telnetd","binary_version":"0.17+2.5-3ubuntu4.2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-19720.json"}},{"package":{"name":"inetutils","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/inetutils?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:2.6-1ubuntu3","2:2.6-4ubuntu1","2:2.7-2ubuntu1","2:2.7-2ubuntu1.1"],"ecosystem_specific":{"binaries":[{"binary_version":"2:2.7-2ubuntu1.1","binary_name":"inetutils-ftp"},{"binary_name":"inetutils-ftpd","binary_version":"2:2.7-2ubuntu1.1"},{"binary_name":"inetutils-inetd","binary_version":"2:2.7-2ubuntu1.1"},{"binary_name":"inetutils-ping","binary_version":"2:2.7-2ubuntu1.1"},{"binary_name":"inetutils-syslogd","binary_version":"2:2.7-2ubuntu1.1"},{"binary_name":"inetutils-talk","binary_version":"2:2.7-2ubuntu1.1"},{"binary_name":"inetutils-talkd","binary_version":"2:2.7-2ubuntu1.1"},{"binary_name":"inetutils-telnet","binary_version":"2:2.7-2ubuntu1.1"},{"binary_name":"inetutils-telnetd","binary_version":"2:2.7-2ubuntu1.1"},{"binary_name":"inetutils-tools","binary_version":"2:2.7-2ubuntu1.1"},{"binary_name":"inetutils-traceroute","binary_version":"2:2.7-2ubuntu1.1"},{"binary_name":"telnet","binary_version":"0.17+2.7-2ubuntu1.1"},{"binary_version":"0.17+2.7-2ubuntu1.1","binary_name":"telnetd"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-19720.json"}}],"schema_version":"1.9.0","severity":[{"type":"Ubuntu","score":"medium"}]}