PGV-2634740

Disclosed on May 11, 2026 (updated May 12, 2026)

Vulnerability Overview

PGV-2634740 is a category 3 vulnerabilty that affects debian/dnsmasq source, versions *, < 2.90-4~deb12u2, < 2.91-1+deb13u1, *

CVSS Score: 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)

Risk Assessment

customize

The risk assessment shows that this vulnerability is exlpoited by a external attacker. An unauthorized external actor who attempts to exploit this vulnerability without legitimate access.

The impact is contained to the application. Exploitation remains confined to the application and cannot affect the host environment or external systems.

The threat damage is caused by a data breach (limited). Exploitation does not provide access to data beyond what the user is already authorized to access.

Vulnerability Details

A heap-based out-of-bounds read vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to cause a denial of service via a crafted DNS packet.

Additional References

Your Risk Profile

Network Exposure	External Accessable from the public internet
Access Interface	WebBrowser Primarily web-based applications
Service Outage	Disruptive Operations would be impacted
Data Breach	Disruptive Operations would be impacted
Data Tampering	Disruptive Operations would be impacted
Customize

Additional Identifiers

DEBIAN-CVE-2026-4891