High severity8.1NVD Advisory· Published May 4, 2026· Updated May 6, 2026
CVE-2026-29004
CVE-2026-29004
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.
Affected products
1Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
5- busybox.netnvd
- github.com/vda-linux/busybox_mirror/commit/42202bfb1e6ac51fa995beda8be4d7b654aeee2anvd
- github.com/vda-linux/busybox_mirror/commit/d368f3f7836d1c2484c8f839316e5c93e76d4409nvd
- www.vulncheck.com/advisories/busybox-dhcpv6-client-heap-buffer-overflow-via-dns-serversnvd
- y637f9qq2x.com/posts/busybox-dhcpv6-heap-overflow/nvd
News mentions
0No linked articles in our index yet.