dhcpcd: dhcpcd through 10.3.2, fixed in commit 708b4a5, contains a memory leak vulnerability in the IPv6 Router Advertisement...
CVE-2026-56116 is fixed in dhcpcd on 1 platform, first by DEBIAN-CVE-2026-56116, released July 2, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| dhcpcd · Debian 13.5 (trixie) | 1:10.1.0-11+deb13u3 | DEBIAN-CVE-2026-56116 | Jul 2, 2026 |
| dhcpcd · Debian 14 | 1:10.3.2-4 | DEBIAN-CVE-2026-56116 | Jul 2, 2026 |
| dhcpcd · opensuse-leap 16.0 | 10.5.0-160000.1.1 | OPENSUSE-SU-2026:21692-1 | Aug 30, 2026 |
| dhcpcd · sles 16.0 | 10.5.0-160000.1.1 | SUSE-SU-2026:23562-1 | Aug 30, 2026 |
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