CVE-2026-29004
HIGH
MEDIUM
Priority: 0.03
BB Relevance:
59/100
Published: 2026-05-04
Modified: 2026-10-26
First seen: 2026-10-29
Status: active
Attack Surface
Adjacent
Low Complexity
No Auth
No Interaction
Integ. Impact
CVSS Vector Breakdown
AV:
Adjacent
AC:
Low
PR:
None
UI:
None
S:
X
AT:
None
VC:
None
VI:
High
VA:
High
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.