Vulnerability Details CVE-2026-42511
The BOOTP file field is written to the lease file without escaping embedded double-quotes, allowing injection of arbitrary dhclient.conf directives. When the lease file is subsequently re-parsed by dhclient, e.g., after a system restart, an attacker-controlled field from the lease is passed to dhclient-script(8), which evaluates it.
A rogue DHCP server may be able to execute arbirary code as root on a system running dhclient.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 10.9%
CVSS Severity
CVSS v3 Score 8.1