CVE-2026-4893

Public on 2026-05-11
Modified on 2026-05-14
Description
An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a crafted DNS packet with RFC 7871 client subnet information.
Severity
Medium severity
Medium
See what this means
CVSS v3 Base Score
5.3
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 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

References

FAQs regarding Amazon Linux ALAS/CVE Severity Red Hat: CVE-2026-4893 Mitre: CVE-2026-4893