CVE-2026-42512
8.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| FreeBSD | FreeBSD | 15.0-RELEASE < p7 | affected |
| FreeBSD | FreeBSD | 14.4-RELEASE < p3 | affected |
| FreeBSD | FreeBSD | 14.3-RELEASE < p12 | affected |
| FreeBSD | FreeBSD | 13.5-RELEASE < p13 | affected |
Weaknesses
- CWE-122: CWE-122: Heap-based Buffer Overflow
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: total
References
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