🛡️ CVE-2026-42512
🟠 CVSS 8.1 — High ✅ No Known Exploit CWE-122 NVD
8.1
CVSS Score
0 Low4 Medium7 High9 Critical10

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. 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.

Details

Severity HIGH
CVSS Score 8.1
CVSS Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE CWE-122
Public Exploit ✅ No
Source NVD
Published 2026-04-30
Updated 2026-06-02
Modified 2026-05-01
Fix URL N/A

Affected Packages

Software From version Fixed in
freebsd

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