USN-8311-1: Dnsmasq vulnerability
Publication date
26 May 2026
Overview
Dnsmasq could be made to crash if it received specially crafted input.
Releases
Packages
- dnsmasq - Small caching DNS proxy and DHCP/TFTP server
Details
Petr Menšík discovered that Dnsmasq incorrectly handled certain
input in the dhcp_release utility. A local attacker could possibly
use this issue to cause Dnsmasq to crash, resulting in a denial of
service.
Petr Menšík discovered that Dnsmasq incorrectly handled certain
input in the dhcp_release utility. A local attacker could possibly
use this issue to cause Dnsmasq to crash, resulting in a denial of
service.
Update instructions
In general, a standard system update will make all the necessary changes.
Learn more about how to get the fixes.The problem can be corrected by updating your system to the following package versions:
| Ubuntu Release | Package Version | ||
|---|---|---|---|
| 14.04 LTS trusty | dnsmasq-utils – 2.68-1ubuntu0.2+esm6 | ||
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