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CVE PROGRAM SOURCE RECORD8.1 High

CVE-2026-42511

Remote code execution via malicious DHCP options

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Status
Published
Published
Updated
Assigning organization
freebsd

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

FreeBSD FreeBSD

Default version status: unknown

  • 15.0-RELEASE to < p7affected
  • 14.4-RELEASE to < p3affected
  • 14.3-RELEASE to < p12affected
  • 13.5-RELEASE to < p13affected

References