Security Advisory

CVE-2026-7426

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-04-29 18:53:52

Last updated 2026-04-29 22:14:34

Assigner AMZN

CVSS score 8.1

State PUBLISHED

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.

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