What is CVE-2026-56113?

CVE-2026-56113 is a medium-severity vulnerability in Networkconfiguration Dhcpcd, classified under Use After Free. CVSS score: 5.3/10. Published 2026-06-23.

How severe is CVE-2026-56113?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Use After Free in Networkconfiguration Dhcpcd

CVE-2026-56113

dhcpcd through 10.3.2, fixed in commit 5733d3c, contains a heap use-after-free vulnerability that allows unauthenticated same-link attackers to crash the daemon by sending a crafted DHCPv6 RENEW reply with RFC6603 OPTION_PD_EXCLUDE and bot…

Vulnerability class: Use-After-Free

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Networkconfiguration Dhcpcd — versions 0, 5733d3c59a5651f64357ac11c98b4f39895c8d25

Weakness classification (CWE)

CWE-416 — Use After Free

References

disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-56113?: CVE-2026-56113 is a medium-severity vulnerability in Networkconfiguration Dhcpcd, classified under Use After Free. CVSS score: 5.3/10. Published 2026-06-23.
How severe is CVE-2026-56113?: Medium severity. CVSS v3 base score is 5.3 out of 10.