Disclosure summary
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.
Source-reported weakness categories
CWE-401
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
NIST National Vulnerability Database · NVD-CVE-2026-56116
Open original source · Updated Oct 08, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
| Vendor | Product / association | Version / bounds |
|---|---|---|
| dhcpcd_project | dhcpcd | * {"versionStartIncluding":"10.0.7","versionEndExcluding":"10.5.0"} |
Original records & references
- NIST NVD record
- CVE Program record
- github.com — Patch
- www.vulncheck.com — Third Party Advisory
PUBLISHED 2026-06-23T13:17:09-04:00
MODIFIED 2026-10-08T14:06:14-04:00
INGESTED 2026-10-10T20:50:35-04:00