What is CVE-2019-11577?

CVE-2019-11577 is a critical-severity vulnerability in Dhcpcd Project, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2019-04-28.

How severe is CVE-2019-11577?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Dhcpcd Project

CVE-2019-11577

dhcpcd before 7.2.1 contains a buffer overflow in dhcp6_findna in dhcp6.c when reading NA/TA addresses.

Vulnerability class: Buffer Overflow

Published 2019-04-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.531 (99.0th percentile), scored 2026-10-29.

High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.531 · newest: 0.531 · change: 0.000

Affected products

Dhcpcd Project

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

References

roy.marples.name/git/dhcpcd.git/commit/ (Patch, Third Party Advisory)
roy.marples.name/archives/dhcpcd-discuss/0002415.html (Third Party Advisory)
www.securityfocus.com/bid/108090 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2019-11577?: CVE-2019-11577 is a critical-severity vulnerability in Dhcpcd Project, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2019-04-28.
How severe is CVE-2019-11577?: Critical severity. CVSS v3 base score is 9.8 out of 10.