CVE-2026-7424

The record

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 packages

Related vulnerabilities

• CVE-2026-88833 A flaw was found in BusyBox's udhcpc DHCP client. CWE-191
• CVE-2026-44235 rabbitmq-c is a C-language AMQP client library for RabbitMQ. CWE-191
• CVE-2026-81977 Acrobat Reader is affected by an Integer Underflow (Wrap or Wraparound) vulnerability… CWE-191
• CVE-2026-66767 SAP NetWeaver Application Server for ABAP and ABAP Platform allows an unauthenticated… CWE-191
• CVE-2026-18341 IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authenticated attacker to corrupt… CWE-191
• CVE-2026-9624 A denial-of-service security issue exists within RSLinx® Classic. CWE-191
• CVE-2026-9622 A denial-of-service security issue exists within RSLinx® Classic. CWE-191
• CVE-2026-82480 A security flaw has been discovered in NASA cFS up to 7.0.1. CWE-191