Cloudanix VulnDB

CVE-2026-42511

High · 8.1

CVSS

8.1

EPSS

0.4%

Published

Apr 30, 2026

CISA due date

—

The record

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.

Affected packages

Ecosystem Package Introduced Fixed

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