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

See what this means

CVSS v3 Base Score

5.3

See breakdown

Affected Packages

Platform	Package	Status
Amazon Linux 2 - Core	dnsmasq	Pending Fix
Amazon Linux 2 - Dnsmasq Extra	dnsmasq	Pending Fix
Amazon Linux 2023	dnsmasq	Pending Fix

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