CVE-2026-4892

Public on 2026-05-11
Modified on 2026-05-14
Description
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.
Severity
Important severity
Important
See what this means
CVSS v3 Base Score
7.5
See breakdown

Affected Packages

Platform Package Release Date Advisory Status
Amazon Linux 2 - Core dnsmasq 2026-05-26 ALAS2-2026-3318 Fixed
Amazon Linux 2 - Dnsmasq Extra dnsmasq 2026-05-26 ALAS2DNSMASQ-2026-004 Fixed
Amazon Linux 2023 dnsmasq 2026-05-26 ALAS2023-2026-1729 Fixed

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 7.5 CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References

FAQs regarding Amazon Linux ALAS/CVE Severity Red Hat: CVE-2026-4892 Mitre: CVE-2026-4892