CVE-2026-56116
Medium · 6.5CVSS
6.5
EPSS
0.3%
Published
Jun 23, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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