Description

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.

INFO

Published Date :

2026-04-29T18:51:28.385Z

Last Modified :

2026-04-29T22:13:39.794Z

Source :

AMZN
AFFECTED PRODUCTS

The following products are affected by CVE-2026-7424 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-2026-7424.

URL Resource
https://aws.amazon.com/security/security-bulletins/2026-022-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