Memory Leak Affecting dhcpcd package, versions <10.5.2-r0


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.29% (21st percentile)

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  • Snyk IDSNYK-ALPINE323-DHCPCD-19666638
  • published10 Sept 2026
  • disclosed23 Jun 2026

Introduced: 23 Jun 2026

CVE-2026-56116  (opens in a new tab)
CWE-401  (opens in a new tab)

How to fix?

Upgrade Alpine:3.23 dhcpcd to version 10.5.2-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream dhcpcd package and not the dhcpcd package as distributed by Alpine. See How to fix? for Alpine:3.23 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1