CVE-2026-56116
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 products
- Dhcpcd
- Dhcpcd Project Dhcpcd
- ≤ 10.3.2
- Fix
- Available
- CVSS 4.0
- 7.1 HIGH
- CVSS 3.1
- 6.5 MEDIUM
- EPSS
- 0.3% (21th percentile)
- Weakness
- CWE-401
- NVD status
- Analyzed
- Published
- 2026-06-23
CVE-2026-56116 at NVD
No indexed exploits for CVE-2026-56116 yet
Our index is partial: it proves presence, never absence
No exploit for CVE-2026-56116 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.