CVE-2025-11618: Invalid Pointer Dereference when receiving UDP/IPv6 packets in FreeRTOS-Plus-TCP

Q: What is the severity of CVE-2025-11618?

CVE-2025-11618 is classified as a critical vulnerability due to its potential to lead to an invalid pointer dereference.

Q: How do I fix CVE-2025-11618?

To fix CVE-2025-11618, upgrade to the latest version of FreeRTOS-Plus-TCP that addresses this vulnerability.

Q: Who is affected by CVE-2025-11618?

CVE-2025-11618 affects applications using FreeRTOS-Plus-TCP that process UDP or IPv6 packets.

Q: What components of FreeRTOS are impacted by CVE-2025-11618?

CVE-2025-11618 impacts the UDP/IPv6 packet processing code specifically.

Q: What specific conditions trigger CVE-2025-11618?

CVE-2025-11618 is triggered by receiving a UDP/IPv6 packet with an incorrect IP version field in the header.

Published Oct 10, 2025

Updated

A missing validation check in FreeRTOS-Plus-TCP's UDP/IPv6 packet processing code can lead to an invalid pointer dereference when receiving a UDP/IPv6 packet with an incorrect IP version field in the packet header. This issue only affects applications using IPv6. We recommend upgrading 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-2025-11618?

CVE-2025-11618 is classified as a critical vulnerability due to its potential to lead to an invalid pointer dereference.

How do I fix CVE-2025-11618?

To fix CVE-2025-11618, upgrade to the latest version of FreeRTOS-Plus-TCP that addresses this vulnerability.

Who is affected by CVE-2025-11618?

CVE-2025-11618 affects applications using FreeRTOS-Plus-TCP that process UDP or IPv6 packets.

What components of FreeRTOS are impacted by CVE-2025-11618?

CVE-2025-11618 impacts the UDP/IPv6 packet processing code specifically.

What specific conditions trigger CVE-2025-11618?

CVE-2025-11618 is triggered by receiving a UDP/IPv6 packet with an incorrect IP version field in the header.

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