CVE-2026-7426

Published April 29th, 2026

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CVSS v3

8.1

HIGH

CVSS v2

N/A

Affected

PROJECT

Description

Insufficient validation of the prefix length field in IPv6 Router Advertisement processing in FreeRTOS-Plus-TCP before V4.2.6 and V4.4.1 allows an adjacent network actor to cause memory corruption by sending a crafted Router Advertisement with a prefix length value exceeding the maximum valid length, resulting in a heap buffer overflow. Users processing IPv4 RA only are not impacted. To mitigate this issue, users should upgrade to the fixed version when available.

FreeRTOS/FreeRTOS-Plus-TCP

FreeRTOS-Plus-TCP library repository. +TCP files only. Submoduled into https://github.com/FreeRTOS/FreeRTOS and various other repos.

GitHub

210