What is CVE-2026-4892?

CVE-2026-4892 is a high-severity vulnerability in Dnsmasq, classified under CWE-122: HEAP-BASED BUFFER OVERFLOW. CVSS score: 8.4/10. Published 2026-05-11.

How severe is CVE-2026-4892?

High severity. CVSS v3 base score is 8.4 out of 10.

Vulnerability in Dnsmasq

CVE-2026-4892

A heap-based out-of-bounds write vulnerability in the DHCPv6 implementation of dnsmasq allows local attackers to execute arbitrary code with root privileges via a crafted DHCPv6 packet.

EPSS: 0.000 (2.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Dnsmasq — versions 0, 2.93, 2.92rel2

References

cret@cert.org
cret@cert.org
cret@cert.org
cret@cert.org
cret@cert.org
cret@cert.org
cret@cert.org

Frequently asked questions

What is CVE-2026-4892?: CVE-2026-4892 is a high-severity vulnerability in Dnsmasq, classified under CWE-122: HEAP-BASED BUFFER OVERFLOW. CVSS score: 8.4/10. Published 2026-05-11.
How severe is CVE-2026-4892?: High severity. CVSS v3 base score is 8.4 out of 10.