CVE-2025-11617: Buffer Over-read when receiving IPv6 packets with incorrect payload length in FreeRTOS-Plus-TCP

Q: What is the severity of CVE-2025-11617?

The severity of CVE-2025-11617 is classified as medium due to the potential for out-of-bounds reads in applications using IPv6.

Q: How do I fix CVE-2025-11617?

To fix CVE-2025-11617, upgrade to the latest version of FreeRTOS-Plus-TCP that contains the necessary validation checks.

Q: Which versions of FreeRTOS-Plus-TCP are affected by CVE-2025-11617?

CVE-2025-11617 affects all versions of FreeRTOS-Plus-TCP that have not implemented the missing validation checks for IPv6 packets.

Q: What applications are impacted by CVE-2025-11617?

Applications using FreeRTOS-Plus-TCP with IPv6 enabled are at risk due to CVE-2025-11617.

Q: When was CVE-2025-11617 discovered?

CVE-2025-11617 was discovered as a result of code analysis and review of the IPv6 packet processing in FreeRTOS-Plus-TCP.

Published Oct 10, 2025

Updated

A missing validation check in FreeRTOS-Plus-TCP's IPv6 packet processing code can lead to an out-of-bounds read when receiving a IPv6 packet with incorrect payload lengths in the packet header. This issue only affects applications using IPv6. We recommend users upgrade to the latest version and ensure any forked or derivative code is patched to incorporate the new fixes.

Affected Software

2 affected components

Freertos FreeRTOS-Plus-TCP

Amazon Freertos-plus-tcp>=4.0.0<4.3.4

Event History

Oct 10, 2025

CVE Published

via MITRE·05:10 PM

Data Sourced

via MITRE·05:10 PM

DescriptionSeverityWeakness

Data Sourced

via NVD·06:15 PM

DescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

What is the severity of CVE-2025-11617?

The severity of CVE-2025-11617 is classified as medium due to the potential for out-of-bounds reads in applications using IPv6.

How do I fix CVE-2025-11617?

To fix CVE-2025-11617, upgrade to the latest version of FreeRTOS-Plus-TCP that contains the necessary validation checks.

Which versions of FreeRTOS-Plus-TCP are affected by CVE-2025-11617?

CVE-2025-11617 affects all versions of FreeRTOS-Plus-TCP that have not implemented the missing validation checks for IPv6 packets.

What applications are impacted by CVE-2025-11617?

Applications using FreeRTOS-Plus-TCP with IPv6 enabled are at risk due to CVE-2025-11617.

When was CVE-2025-11617 discovered?

CVE-2025-11617 was discovered as a result of code analysis and review of the IPv6 packet processing in FreeRTOS-Plus-TCP.

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