{"id":"DEBIAN-CVE-2026-56116","details":"dhcpcd through 10.3.2, fixed in commit 708b4a5, contains a memory leak vulnerability in the IPv6 Router Advertisement route information handling that allows an unauthenticated same-link attacker to cause denial of service by sending crafted Router Advertisements. Attackers can repeatedly send Router Advertisements containing Route Information options with a lifetime of zero, triggering unfreed allocations in routeinfo_findalloc() that cause linear memory exhaustion and eventual daemon crash.","modified":"2026-09-14T17:03:45.826217897Z","published":"2026-06-23T17:17:09.410Z","upstream":["CVE-2026-56116"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-56116"}],"affected":[{"package":{"name":"dhcpcd","ecosystem":"Debian:13","purl":"pkg:deb/debian/dhcpcd?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:10.1.0-11+deb13u3"}]}],"versions":["1:10.1.0-11","1:10.1.0-11+deb13u1","1:10.1.0-11+deb13u2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-56116.json"}},{"package":{"name":"dhcpcd","ecosystem":"Debian:14","purl":"pkg:deb/debian/dhcpcd?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:10.3.2-4"}]}],"versions":["1:10.1.0-11","1:10.1.0-12","1:10.2.0-1","1:10.2.2-1","1:10.2.2-2","1:10.2.2-3","1:10.2.2-4","1:10.2.2-5","1:10.2.2-6","1:10.2.3-1","1:10.2.4-1","1:10.2.4-2","1:10.2.4-3","1:10.2.4-4","1:10.2.4-4~bpo13+1","1:10.3.0-1","1:10.3.0-2","1:10.3.0-2~bpo13+1","1:10.3.0-3","1:10.3.0-3~bpo13+1","1:10.3.0-4","1:10.3.0-5","1:10.3.0-6","1:10.3.0-7","1:10.3.0-7~bpo13+1","1:10.3.1-1","1:10.3.1-1~bpo13+1","1:10.3.1-2","1:10.3.1-3","1:10.3.1-4","1:10.3.1-5","1:10.3.1-5~bpo13+1","1:10.3.2-1","1:10.3.2-2","1:10.3.2-3","1:10.3.2-3~bpo13+1","1:10.3.2-4~bpo13+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-56116.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}