CVE-2026-56116 — MEDIUM (6.5)

Q: How severe is CVE-2026-56116?

CVE-2026-56116 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-56116?

Check the references section above for vendor advisories and patch information. Affected products include: Dhcpcd Project Dhcpcd.

Vulnerability Description

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 Score

6.5

MEDIUM

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

ADJACENT_NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Dhcpcd Project	Dhcpcd	<= 10.3.2

Related Weaknesses (CWE)

CWE-401

References

FAQ

What is CVE-2026-56116?

CVE-2026-56116 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 ca...

How severe is CVE-2026-56116?

CVE-2026-56116 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-56116?

Check the references section above for vendor advisories and patch information. Affected products include: Dhcpcd Project Dhcpcd.