========================================================================== Ubuntu Security Notice USN-8311-1 May 26, 2026
dnsmasq vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 14.04 LTS
Summary:
Dnsmasq could be made to crash if it received specially crafted
input.
Software Description:
- 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.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 14.04 LTS
dnsmasq-utils 2.68-1ubuntu0.2+esm6
Available with Ubuntu Pro
In general, a standard system update will make all the necessary
changes.
References:
https://ubuntu.com/security/notices/USN-8311-1
CVE-2020-37127
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