USN-8308-1: Dnsmasq vulnerability
Publication date
26 May 2026
Overview
Dnsmasq could be made to crash or run programs if it received specially crafted network traffic.
Releases
Packages
- dnsmasq - Small caching DNS proxy and DHCP/TFTP server
Details
It was discovered that Dnsmasq incorrectly handled BOOTREPLY packets when
configured with the --dhcp-split-relay option. A remote attacker could
use this issue to cause Dnsmasq to crash, resulting in a denial of
service, or possibly execute arbitrary code.
It was discovered that Dnsmasq incorrectly handled BOOTREPLY packets when
configured with the --dhcp-split-relay option. A remote attacker could
use this issue to cause Dnsmasq to crash, resulting in a denial of
service, or possibly execute arbitrary code.
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 | ||
|---|---|---|---|
| 26.04 LTS resolute | dnsmasq – 2.92-1ubuntu0.3 | ||
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