CVE-2026-42512
High · 8.1CVSS
8.1
EPSS
1.8%
Published
Apr 30, 2026
CISA due date
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The record
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 packages
| Ecosystem | Package | Introduced | Fixed |
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