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CVE-2026-4892

HighPublished

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

Published: May 11, 2026
Updated: Sep 1, 2026
Assigning CNA: certcc
Evidence observed: Aug 17, 2026

Primary CVSS

8.8/ 10High

nvd · CVSS 3.1

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS probability estimate

0.8%

Low · next 30 days

Percentile: 55.0%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

dnsmasq-cve-2026Scanner
Automated defect verification tool for 6 dnsmasq CVEs (CVE-2026-2291, 4890, 4891, 4892, 4893, 5172)

Responsible use

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