{"id":"UBUNTU-CVE-2026-14461","details":"mtr is vulnerable to Out-of-bound read vulnerability in ipinfo_lookup() function. An attacker who can influence the TXT response used for AS lookups can trigger this bug by returning a DNS response that is larger than 512 bytes and uses a crafted compression pointer in the answer NAME field. ipinfo_lookup() function uses the length of the response as the end-of-message boundary for dn_expand() function. The result is a reliable crash. This issue exists in the mtr through version 0.96 and it was fixed in commit 48e1794414d338ce47abc0f27c25ade8788af9c3.","modified":"2026-07-16T20:50:03.203263938Z","published":"2026-07-10T11:16:00Z","upstream":["CVE-2026-14461"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-14461"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-14461"},{"type":"REPORT","url":"https://cert.pl/en/posts/2026/07/CVE-2026-14461"}],"affected":[{"package":{"name":"mtr","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/mtr?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.85-1","0.85-2"],"ecosystem_specific":{"priority_reason":"Only a denial of service in traceroute tool","binaries":[{"binary_name":"mtr","binary_version":"0.85-2"},{"binary_version":"0.85-2","binary_name":"mtr-tiny"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-14461.json"}},{"package":{"name":"mtr","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/mtr?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.85-3","0.86-1","0.86-1ubuntu0.1"],"ecosystem_specific":{"priority_reason":"Only a denial of service in traceroute tool","binaries":[{"binary_name":"mtr","binary_version":"0.86-1ubuntu0.1"},{"binary_version":"0.86-1ubuntu0.1","binary_name":"mtr-tiny"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-14461.json"}},{"package":{"name":"mtr","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/mtr?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.87-1","0.92-1"],"ecosystem_specific":{"priority_reason":"Only a denial of service in traceroute tool","binaries":[{"binary_version":"0.92-1","binary_name":"mtr"},{"binary_name":"mtr-tiny","binary_version":"0.92-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-14461.json"}},{"package":{"name":"mtr","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/mtr?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.93-1"],"ecosystem_specific":{"priority_reason":"Only a denial of service in traceroute tool","binaries":[{"binary_version":"0.93-1","binary_name":"mtr"},{"binary_name":"mtr-tiny","binary_version":"0.93-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-14461.json"}},{"package":{"name":"mtr","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/mtr?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.94-1build1","0.94-2ubuntu1","0.95-1"],"ecosystem_specific":{"binaries":[{"binary_name":"mtr","binary_version":"0.95-1"},{"binary_name":"mtr-tiny","binary_version":"0.95-1"}],"priority_reason":"Only a denial of service in traceroute tool"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-14461.json"}},{"package":{"name":"mtr","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/mtr?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.95-1","0.95-1.1","0.95-1.1build1","0.95-1.1build2","0.95-1.1ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_name":"mtr","binary_version":"0.95-1.1ubuntu0.1"},{"binary_name":"mtr-tiny","binary_version":"0.95-1.1ubuntu0.1"}],"priority_reason":"Only a denial of service in traceroute tool"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-14461.json"}},{"package":{"name":"mtr","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/mtr?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.95-1.1ubuntu1","0.95-1.1ubuntu2"],"ecosystem_specific":{"priority_reason":"Only a denial of service in traceroute tool","binaries":[{"binary_name":"mtr","binary_version":"0.95-1.1ubuntu2"},{"binary_version":"0.95-1.1ubuntu2","binary_name":"mtr-tiny"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-14461.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"low"}]}