dnsmasq 2.92rel2 Heap OOB via extract_name() can cause Cache Poisoning
CVE-2026-2291 Published on May 11, 2026

CVE-2026-2291
dnsmasqs extract_name() function can be abused to cause a heap buffer overflow, allowing an attacker to inject false DNS cache entries, which could result in DNS lookups to redirect to an attacker-controlled IP address, or to cause a DoS.

NVD

Vulnerability Analysis

CVE-2026-2291 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 be low. considered to have a small impact on confidentiality and integrity and availability.

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

Products Associated with CVE-2026-2291

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Canonical Ubuntu Linux
 

Affected Versions

dnsmasq Version 2.92rel2 is affected by CVE-2026-2291