What is CVE-2026-56117?

CVE-2026-56117 is a medium-severity vulnerability in Dhcpcd_project Dhcpcd, classified under Use After Free. CVSS score: 4.7/10. Published 2026-06-23.

How severe is CVE-2026-56117?

Medium severity. CVSS v3 base score is 4.7 out of 10.

Use After Free in Dhcpcd_project Dhcpcd

CVE-2026-56117

dhcpcd through 10.3.2, fixed in commit 78ea09e, contains a heap use-after-free vulnerability in the control socket handling within src/control.c that allows local unprivileged attackers to trigger memory corruption when privilege separatio…

Vulnerability class: Use-After-Free

EPSS: 0.001 (0.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Dhcpcd_project Dhcpcd
Networkconfiguration Dhcpcd — versions 0, 78ea09ed1633a583dbcde6e7bab9df4639ec8a34

Weakness classification (CWE)

CWE-416 — Use After Free

References

disclosure@vulncheck.com (Patch, patch)
disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2026-56117?: CVE-2026-56117 is a medium-severity vulnerability in Dhcpcd_project Dhcpcd, classified under Use After Free. CVSS score: 4.7/10. Published 2026-06-23.
How severe is CVE-2026-56117?: Medium severity. CVSS v3 base score is 4.7 out of 10.