CVE-2026-42512 Remotely triggerable out-of-bounds heap write in dhclient

As dhclient is building an environment to pass to dhclient-script, it may need to resize the array of string pointers. The code which expands the array incorrectly calculates its new size when requesting memory, resulting in a heap buffer overrun. A specially crafted packet can cause dhclient to...

EUVD-2026-26357

As dhclient is building an environment to pass to dhclient-script, it may need to resize the array of string pointers. The code which expands the array incorrectly calculates its new size when requesting memory, resulting in a heap buffer overrun. A specially crafted packet can cause dhclient to...

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...

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 subsequently re-parsed by dhclient, e.g., after a system restart, an attacker-controlled field from the lease is passed to...

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...

EUVD-2026-26350

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...

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 subsequently re-parsed by dhclient, e.g., after a system restart, an attacker-controlled field from the lease is passed to...

FreeBSD : FreeBSD -- Remotely triggerable out-of-bounds heap write in dhclient (58acf4c5-4435-11f1-bb07-bc241121aa0a)

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 58acf4c5-4435-11f1-bb07-bc241121aa0a advisory. As dhclient is building an environment to pass to dhclient-script, it may need to resize the array of...

FreeBSD : FreeBSD -- Remote code execution via malicious DHCP options (9eb2533e-4434-11f1-bb07-bc241121aa0a)

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 9eb2533e-4434-11f1-bb07-bc241121aa0a advisory. The BOOTP file field is written to the lease file without escaping embedded double-quotes, allowing...

FreeBSD security vulnerabilities

FreeBSD is a Unix-like operating system developed by the FreeBSD Foundation. There is a security vulnerability in FreeBSD, which stems from the BOOTP file field not properly escaping double quotes when writing the lease file. This allows arbitrary dhclient.conf commands to be injected, potentiall...

CVE-2026-42512: Heap-based Buffer Overflow

As dhclient is building an environment to pass to dhclient-script, it may need to resize the array of string pointers. The code which expands the array incorrectly calculates its new size when requesting memory, resulting in a heap buffer overrun. A specially crafted packet can cause dhclient to...

CVE-2026-42511: Improper Neutralization of Quoting Syntax

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...

FreeBSD Security Advisory - FreeBSD-SA-26:15.dhclient

FreeBSD Security Advisory - As dhclient is building an environment to pass to dhclient-script, it may need to resize the array of string pointers. The code which expands the array incorrectly calculates its new size when requesting memory, resulting in a heap buffer overrun...

FreeBSD-SA-26:15.dhclient

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 ============================================================================= FreeBSD-SA-26:15.dhclient Security Advisory The FreeBSD Project Topic: Remotely triggerable out-of-bounds heap write in dhclient Category: core Module: dhclient Announced:...

FreeBSD Security Advisory - FreeBSD-SA-26:12.dhclient

FreeBSD Security Advisory - 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 fr...

FreeBSD-SA-26:12.dhclient

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 ============================================================================= FreeBSD-SA-26:12.dhclient Security Advisory The FreeBSD Project Topic: Remote code execution via malicious DHCP options Category: core Module: dhclient Announced:...

FreeBSD -- Remote code execution via malicious DHCP options

Problem 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...

FreeBSD -- Remotely triggerable out-of-bounds heap write in dhclient

Problem Description: As dhclient is building an environment to pass to dhclient-script, it may need to resize the array of string pointers. The code which expands the array incorrectly calculates its new size when requesting memory, resulting in a heap buffer overrun. Impact: A specially crafted...

MiracleLinux 4 : dhcp-4.1.1-63.P1.0.2.AXS4 (AXSA:2021-2027:03)

The remote MiracleLinux 4 host has packages installed that are affected by a vulnerability as referenced in the AXSA:2021-2027:03 advisory. dhcp: stack-based buffer overflow when parsing statements with colon-separated hex digits in config or lease files in dhcpd and dhclient CVE-2021-25217 Tenab...

MiracleLinux 8 : dhcp-4.3.6-44.el8.1 (AXSA:2021-2197:04)

The remote MiracleLinux 8 host has packages installed that are affected by a vulnerability as referenced in the AXSA:2021-2197:04 advisory. dhcp: stack-based buffer overflow when parsing statements with colon-separated hex digits in config or lease files in dhcpd and dhclient CVE-2021-25217 Tenab...