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.

INFO

Published Date :

2026-04-29T18:53:52.187Z

Last Modified :

2026-04-29T22:14:34.199Z

Source :

AMZN
AFFECTED PRODUCTS

The following products are affected by CVE-2026-7426 vulnerability.

Vendors Products
Amazon
  • Freertos-plus-tcp
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-7426.

URL Resource
https://aws.amazon.com/security/security-bulletins/2026-023-aws/ cve-icon cve-icon
https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.2.6 cve-icon cve-icon
https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.4.1 cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
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Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact