{"id":"UBUNTU-CVE-2026-14258","details":"A flaw was found in dhcpcd's IPv6 Neighbor Discovery Router Advertisement processing. A specially crafted IPv6 Router Advertisement containing a zero-length Neighbor Discovery option can bypass validation during packet storage and later be reparsed without adequate validation, causing the parser to enter a non-advancing loop. Successful exploitation may result in excessive CPU consumption, leading to a denial of service.","modified":"2026-07-01T23:38:35.986871324Z","published":"2026-07-01T11:16:00Z","upstream":["CVE-2026-14258"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-14258"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-14258"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-14258"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2462305"},{"type":"REPORT","url":"https://github.com/NetworkConfiguration/dhcpcd/commit/75289ca"},{"type":"REPORT","url":"https://github.com/NetworkConfiguration/dhcpcd/issues/415"}],"affected":[{"package":{"name":"dhcpcd","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/dhcpcd?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:10.0.2-3ubuntu3","1:10.0.5-1","1:10.0.5-2","1:10.0.5-3","1:10.0.5-4","1:10.0.5-5","1:10.0.6-1","1:10.0.6-1ubuntu1","1:10.0.6-1ubuntu2","1:10.0.6-1ubuntu3","1:10.0.6-1ubuntu3.1","1:10.0.6-1ubuntu3.2"],"ecosystem_specific":{"binaries":[{"binary_name":"dhcpcd","binary_version":"1:10.0.6-1ubuntu3.2"},{"binary_name":"dhcpcd-base","binary_version":"1:10.0.6-1ubuntu3.2"},{"binary_name":"dhcpcd5","binary_version":"1:10.0.6-1ubuntu3.2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-14258.json"}},{"package":{"name":"dhcpcd","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/dhcpcd?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:10.1.0-8","1:10.1.0-10","1:10.1.0-11","1:10.1.0-12","1:10.2.4-3","1:10.2.4-4"],"ecosystem_specific":{"binaries":[{"binary_name":"dhcpcd","binary_version":"1:10.2.4-4"},{"binary_name":"dhcpcd-base","binary_version":"1:10.2.4-4"},{"binary_name":"dhcpcd5","binary_version":"1:10.2.4-4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-14258.json"}},{"package":{"name":"dhcpcd","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/dhcpcd?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:10.2.4-4","1:10.3.0-2","1:10.3.0-3","1:10.3.0-7"],"ecosystem_specific":{"binaries":[{"binary_version":"1:10.3.0-7","binary_name":"dhcpcd"},{"binary_version":"1:10.3.0-7","binary_name":"dhcpcd-base"},{"binary_version":"1:10.3.0-7","binary_name":"dhcpcd5"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-14258.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}