CVE-2026-42511 — Remote code execution via malicious DHCP options
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 subs…
Published: 2026-04-30 · CVSS: 8.1 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7