This indicates an attack attempt to exploit a Memory Corruption Vulnerability in dnsmasq.
The vulnerability is due to an error in the vulnerable application when handling a maliciously crafted DNS message. A remote attacker may be able to exploit this to execute arbitrary code within the context of the system.
dnsmasq version prior to 2.83
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor.