How severe is CVE-2019-11577?

CVE-2019-11577 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-11577 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 53% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-11577?

CVE-2019-11577 affects Dhcpcd Project Dhcpcd. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-11577?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2019-11577 published?

CVE-2019-11577 was published on 2019-04-28 and last updated on 2026-06-17.

CVE-2019-11577

CVE-2019-11577 is a critical-severity vulnerability in Dhcpcd Project Dhcpcd with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 53% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-119.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 53% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Dhcpcd Project Dhcpcd
Published: 2019-04-28
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is CVE-2019-11577?: dhcpcd before 7.2.1 contains a buffer overflow in dhcp6_findna in dhcp6.c when reading NA/TA addresses.
How severe is CVE-2019-11577?: CVE-2019-11577 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-11577 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 53% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-11577?: CVE-2019-11577 affects Dhcpcd Project Dhcpcd. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-11577?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2019-11577 published?: CVE-2019-11577 was published on 2019-04-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:dhcpcd_project:dhcpcd:*:*:*:*:*:*:*:*

More vulnerabilities in Dhcpcd Project Dhcpcd

CVE-2019-11766 — Critical (CVSS 9.8): dhcp6.c in dhcpcd before 6.11.7 and 7.x before 7.2.2 has a buffer over-read in the D6_OPTION_PD_EXCLUDE feature.
CVE-2016-1503 — Critical (CVSS 9.8): dhcpcd before 6.10.0, as used in Android 4.x before 4.4.4, 5.0.x before 5.0.2, 5.1.x before 5.1.1, and 6.x before…
CVE-2016-1504 — High (CVSS 7.5): dhcpcd before 6.10.0 allows remote attackers to cause a denial of service (invalid read and crash) via vectors related…
CVE-2012-6700 — High (CVSS 7.5): The decode_search function in dhcp.c in dhcpcd 3.x does not properly free allocated memory, which allows remote DHCP…
CVE-2012-6699 — High (CVSS 7.5): The decode_search function in dhcp.c in dhcpcd 3.x allows remote DHCP servers to cause a denial of service…
CVE-2012-6698 — High (CVSS 7.5): The decode_search function in dhcp.c in dhcpcd 3.x allows remote DHCP servers to cause a denial of service…

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