What is CVE-2026-56114?

CVE-2026-56114 is a medium-severity vulnerability, classified under Out-of-bounds Write. CVSS score: 5.3/10. Published 2026-06-23.

How severe is CVE-2026-56114?

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

CVE-2026-56114

CVE-2026-56114

dhcpcd through 10.3.2, fixed in commit 2f00c7b, contains a one-byte stack out-of-bounds write vulnerability in dhcp6_makemessage() in src/dhcp6.c that allows unauthenticated same-link attackers to write beyond a fixed local buffer by seria…

Vulnerability class: Buffer Overflow

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.

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

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

Frequently asked questions

What is CVE-2026-56114?: CVE-2026-56114 is a medium-severity vulnerability, classified under Out-of-bounds Write. CVSS score: 5.3/10. Published 2026-06-23.
How severe is CVE-2026-56114?: Medium severity. CVSS v3 base score is 5.3 out of 10.