Buffer overflow in Networkconfiguration Dhcpcd
CVE-2026-56115
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.
Affected products
- Networkconfiguration Dhcpcd — versions 0, 2f00c7bfc408b6582d331932dfa47829c4819029
Weakness classification (CWE)
References
- disclosure@vulncheck.com (patch)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-56115?
- CVE-2026-56115 is a medium-severity vulnerability in Networkconfiguration Dhcpcd, classified under Out-of-bounds Write. CVSS score: 5.3/10. Published 2026-06-23.
- How severe is CVE-2026-56115?
- Medium severity. CVSS v3 base score is 5.3 out of 10.