CVE-2026-7424 — Integer Underflow in DHCPv6 Sub-Option Parser in FreeRTOS-Plus-TCP
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,…
Published: 2026-04-29 · CVSS: 7.2 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7