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I. Basic Information for CVE-2026-42511
Vulnerability Information

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Vulnerability Title
Remote code execution via malicious DHCP options
Source: NVD (National Vulnerability Database)
Vulnerability Description
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: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
引号语法转义处理不恰当
Source: NVD (National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
FreeBSDFreeBSD 15.0-RELEASE ~ p7 -
II. Public POCs for CVE-2026-42511
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III. Intelligence Information for CVE-2026-42511
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IV. Related Vulnerabilities
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