CVEvulnerability

CVE-2026-42512

8.1 HIGH Published 2026-04-30 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2026-04-30
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
8.1 HIGH — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-122

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.

Affected configurations

• freebsd freebsd 13.5 • freebsd freebsd 14.3 • freebsd freebsd 14.4 • freebsd freebsd 15.0

Related

Weakness · CWE (1)

  • CWE-122 Heap-based Buffer Overflow weakness

References