VULNERABILITY INTELLIGENCE
CVE-2026-29004
CVSS score8.1 HIGH
EPSS probability0.38%
CISA KEVNot currently listed
Published2026-05-04
Last modified2026-10-26
CVSS vectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Description
BusyBox before commit 42202bf contains a heap buffer overflow vulnerability in the DHCPv6 client (udhcpc6) DNS_SERVERS option handler in networking/udhcp/d6_dhcpc.c that allows network-adjacent attackers to trigger memory corruption by sending a crafted DHCPv6 response with a malformed D6_OPT_DNS_SERVERS option. Attackers can exploit incorrect heap buffer allocation calculations in the option_to_env() function to cause denial of service or achieve arbitrary code execution on embedded systems without heap hardening.
Weakness classification
- disclosure@vulncheck.com: CWE-122
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c: CWE-131