HIGH SeverityCVSS 4.07.2CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N

CVE-2026-7424

Last updated Apr 29, 2026 · Published Apr 29, 2026

Description

Integer underflow in the DHCPv6 sub-option parser in FreeRTOS-Plus-TCP before V4.4.1 and V4.2.6 allows an adjacent network actor to corrupt the device's IPv6 address assignment, DNS configuration, and lease times, and to cause a denial of service (permanent IP task freeze requiring hardware reset) by sending a single crafted DHCPv6 packet. The issue is present whenever DHCPv6 is enabled. To mitigate this issue, users should upgrade to version V4.2.6 or V4.4.1 or newer.

Affected products

1 listed

AWS:FreeRTOS-Plus-TCP

Mappings

CWE

CWE-191

CAPEC

CAPEC-153

Guides

Rate Limiting in Node.jsPatterns for APIs, login endpoints, and abuse control.

Training

API Design That Defends ItselfREST, GraphQL, and gRPC patterns that reduce your attack surface by design.