CVE-2026-42512

Published: Apr 30, 2026 Last Modified: Mag 01, 2026
ExploitDB:
Other exploit source:
Google Dorks:
HIGH 8,1
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Attack Vector: network
Attack Complexity: high
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high

Description

AI Translation Available

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 overrun its buffer of environment entries. This can result in a crash, but it may be possible to leverage this bug to achieve remote code execution.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,0009
Percentile
0,2th
Updated

EPSS Score Trend (Last 2 Days)

122

Heap-based Buffer Overflow

Draft
Abstraction: Variant Structure: Simple
Common Consequences
Security Scopes Affected:
Availability Integrity Confidentiality Access Control Other
Potential Impacts:
Dos: Crash, Exit, Or Restart Dos: Resource Consumption (Cpu) Dos: Resource Consumption (Memory) Execute Unauthorized Code Or Commands Bypass Protection Mechanism Modify Memory Other
Applicable Platforms
Languages: C, C++, Memory-Unsafe
Likelihood of Exploit: High
View CWE Details
Operating System

Freebsd by Freebsd

Product Information
Vendor Freebsd
Product Freebsd
Version 15.0
cpe:2.3:o:freebsd:freebsd:15.0:p4:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Freebsd by Freebsd

Product Information
Vendor Freebsd
Product Freebsd
Version 14.4
cpe:2.3:o:freebsd:freebsd:14.4:rc1:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Freebsd by Freebsd

Product Information
Vendor Freebsd
Product Freebsd
Version 15.0
cpe:2.3:o:freebsd:freebsd:15.0:p6:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Freebsd by Freebsd

Product Information
Vendor Freebsd
Product Freebsd
Version 13.5
cpe:2.3:o:freebsd:freebsd:13.5:p5:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Freebsd by Freebsd

Product Information
Vendor Freebsd
Product Freebsd
Version 14.4
cpe:2.3:o:freebsd:freebsd:14.4:p2:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Freebsd by Freebsd

Product Information
Vendor Freebsd
Product Freebsd
Version 14.3
cpe:2.3:o:freebsd:freebsd:14.3:p4:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Freebsd by Freebsd

Product Information
Vendor Freebsd
Product Freebsd
Version 14.3
cpe:2.3:o:freebsd:freebsd:14.3:p2:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Freebsd by Freebsd

Product Information
Vendor Freebsd
Product Freebsd
Version 15.0
cpe:2.3:o:freebsd:freebsd:15.0:-:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Freebsd by Freebsd

Product Information
Vendor Freebsd
Product Freebsd
Version 13.5
cpe:2.3:o:freebsd:freebsd:13.5:p1:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Freebsd by Freebsd

Product Information
Vendor Freebsd
Product Freebsd
Version 14.3
cpe:2.3:o:freebsd:freebsd:14.3:p3:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Freebsd by Freebsd

Product Information
Vendor Freebsd
Product Freebsd
Version 13.5
cpe:2.3:o:freebsd:freebsd:13.5:beta3:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Freebsd by Freebsd

Product Information
Vendor Freebsd
Product Freebsd
Version 13.5
cpe:2.3:o:freebsd:freebsd:13.5:p10:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Freebsd by Freebsd

Product Information
Vendor Freebsd
Product Freebsd
Version 13.5
cpe:2.3:o:freebsd:freebsd:13.5:p9:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Freebsd by Freebsd

Product Information
Vendor Freebsd
Product Freebsd
Version 14.3
cpe:2.3:o:freebsd:freebsd:14.3:p7:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Freebsd by Freebsd

Product Information
Vendor Freebsd
Product Freebsd
Version 14.3
cpe:2.3:o:freebsd:freebsd:14.3:p10:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Freebsd by Freebsd

Product Information
Vendor Freebsd
Product Freebsd
Version 13.5
cpe:2.3:o:freebsd:freebsd:13.5:p6:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Freebsd by Freebsd

Product Information
Vendor Freebsd
Product Freebsd
Version 13.5
cpe:2.3:o:freebsd:freebsd:13.5:p4:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Freebsd by Freebsd

Product Information
Vendor Freebsd
Product Freebsd
Version 14.4
cpe:2.3:o:freebsd:freebsd:14.4:-:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Freebsd by Freebsd

Product Information
Vendor Freebsd
Product Freebsd
Version 13.5
cpe:2.3:o:freebsd:freebsd:13.5:-:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Freebsd by Freebsd

Product Information
Vendor Freebsd
Product Freebsd
Version 13.5
cpe:2.3:o:freebsd:freebsd:13.5:p7:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Freebsd by Freebsd

Product Information
Vendor Freebsd
Product Freebsd
Version 14.3
cpe:2.3:o:freebsd:freebsd:14.3:p5:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Freebsd by Freebsd

Product Information
Vendor Freebsd
Product Freebsd
Version 14.3
cpe:2.3:o:freebsd:freebsd:14.3:-:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Freebsd by Freebsd

Product Information
Vendor Freebsd
Product Freebsd
Version 13.5
cpe:2.3:o:freebsd:freebsd:13.5:p8:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Freebsd by Freebsd

Product Information
Vendor Freebsd
Product Freebsd
Version 15.0
cpe:2.3:o:freebsd:freebsd:15.0:p1:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Freebsd by Freebsd

Product Information
Vendor Freebsd
Product Freebsd
Version 15.0
cpe:2.3:o:freebsd:freebsd:15.0:p5:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Freebsd by Freebsd

Product Information
Vendor Freebsd
Product Freebsd
Version 13.5
cpe:2.3:o:freebsd:freebsd:13.5:p2:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Freebsd by Freebsd

Product Information
Vendor Freebsd
Product Freebsd
Version 15.0
cpe:2.3:o:freebsd:freebsd:15.0:p3:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Freebsd by Freebsd

Product Information
Vendor Freebsd
Product Freebsd
Version 14.3
cpe:2.3:o:freebsd:freebsd:14.3:p11:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Freebsd by Freebsd

Product Information
Vendor Freebsd
Product Freebsd
Version 14.3
cpe:2.3:o:freebsd:freebsd:14.3:p6:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Freebsd by Freebsd

Product Information
Vendor Freebsd
Product Freebsd
Version 13.5
cpe:2.3:o:freebsd:freebsd:13.5:p11:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Freebsd by Freebsd

Product Information
Vendor Freebsd
Product Freebsd
Version 14.3
cpe:2.3:o:freebsd:freebsd:14.3:p1:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Freebsd by Freebsd

Product Information
Vendor Freebsd
Product Freebsd
Version 13.5
cpe:2.3:o:freebsd:freebsd:13.5:p3:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Freebsd by Freebsd

Product Information
Vendor Freebsd
Product Freebsd
Version 14.4
cpe:2.3:o:freebsd:freebsd:14.4:p1:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Freebsd by Freebsd

Product Information
Vendor Freebsd
Product Freebsd
Version 14.3
cpe:2.3:o:freebsd:freebsd:14.3:p8:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Freebsd by Freebsd

Product Information
Vendor Freebsd
Product Freebsd
Version 15.0
cpe:2.3:o:freebsd:freebsd:15.0:p2:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Freebsd by Freebsd

Product Information
Vendor Freebsd
Product Freebsd
Version 13.5
cpe:2.3:o:freebsd:freebsd:13.5:p12:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Freebsd by Freebsd

Product Information
Vendor Freebsd
Product Freebsd
Version 14.3
cpe:2.3:o:freebsd:freebsd:14.3:p9:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
https://security.freebsd.org/advisories/FreeBSD-SA-26:15.dh…
https://security.freebsd.org/advisories/FreeBSD-SA-26:15.dhclient.asc