CVE-2019-11577
Criticaldhcpcd before 7.2.1 contains a buffer overflow in dhcp6_findna in dhcp6.c when reading NA/TA addresses.
Published Apr 28, 2019 · Updated Aug 27, 2026 · Also known as DEBIAN-CVE-2019-11577
Key Facts
Patch immediately- CVE-2019-11577 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Dhcpcd (Dhcpcd Project), dhcpcd5 (debian).
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 53% probability of exploitation in the next 30 days.
- Fixed versions are available, including Dhcpcd 7.2.1, dhcpcd5 7.1.0-2.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
9.8
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
53%
Higher than 98.9% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
Get the full CVE-2019-11577 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
dhcpcd before 7.2.1 contains a buffer overflow in dhcp6_findna in dhcp6.c when reading NA/TA addresses.
Affected Products
7 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| DhcpcdDhcpcd Project | See advisory | 7.2.1 |
| dhcpcd5debian | See advisory | 7.1.0-2 |
Patched Releases
Dhcpcd
7.2.1
dhcpcd5
7.1.0-2
Timeline
Publicly disclosed
Apr 28, 2019
Last updated
Aug 27, 2026
Weakness Type
- CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
References
FAQ
Common Questions.
dhcpcd before 7.2.1 contains a buffer overflow in dhcp6_findna in dhcp6.c when reading NA/TA addresses.
Affected: Dhcpcd (Dhcpcd Project); dhcpcd5 (debian). The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Dhcpcd 7.2.1, dhcpcd5 7.1.0-2.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
Is CVE-2019-11577 Running On Your Attack Surface?
Brandefense maps vulnerabilities like this one to your internet-facing assets and tells you exactly where to patch.
Request A Demo