DNSMasq 2.92rel2 DNS Info Disclosure via RFC 7871 Packet
CVE-2026-4893 Published on May 11, 2026

CVE-2026-4893
An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a crafted DNS packet with RFC 7871 client subnet information.

NVD

Vulnerability Analysis

CVE-2026-4893 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality, a small impact on integrity and availability.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
LOW
Integrity Impact:
NONE
Availability Impact:
NONE

Products Associated with CVE-2026-4893

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Canonical Ubuntu Linux
 

Affected Versions

dnsmasq Version 2.92rel2 is affected by CVE-2026-4893