Is CVE-2025-11618 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2025-11618 being exploited in the wild.

How severe is CVE-2025-11618?

High severity, with a CVSS score of 5.4, published 10 October 2025.

Which products and versions are affected?

Amazon Web Services FreeRTOS-Plus-TCP v4.0.0 to v4.3.3.

Is there a fix for CVE-2025-11618?

A patch was published on 2025-10-10: Fixed in FreeRTOS-Plus-TCP version 4.3.4 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2025-11618 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2025-11618?

Check whether you run Amazon AWS, Amazon Freertos-Plus-Tcp or Amazon Web Services FreeRTOS-Plus-TCP at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2025-11618: FreeRTOS-Plus-TCP multiple memory safety vulnerabilities in IPv6 stack

CVE-2025-11618 · Severity: high · CVSS 5.4 · Published 2025-10-10

FreeRTOS-Plus-TCP is a networking library used by embedded devices to communicate over the internet. Multiple vulnerabilities have been identified that could allow an attacker to crash these devices or potentially access sensitive information by sending specially crafted network packets. This affects any device using this library with IPv6 enabled, potentially leading to service disruptions in industrial, medical, or consumer IoT environments.

Technologies: Amazon AWS, Amazon Freertos-Plus-Tcp, Amazon Web Services FreeRTOS-Plus-TCP. Vendors: Amazon, Amazon Web Services.

Quick answers

Is CVE-2025-11618 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2025-11618 being exploited in the wild.
How severe is CVE-2025-11618?: High severity, with a CVSS score of 5.4, published 10 October 2025.
Which products and versions are affected?: Amazon Web Services FreeRTOS-Plus-TCP v4.0.0 to v4.3.3.
Is there a fix for CVE-2025-11618?: A patch was published on 2025-10-10: Fixed in FreeRTOS-Plus-TCP version 4.3.4 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2025-11618 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2025-11618?: Check whether you run Amazon AWS, Amazon Freertos-Plus-Tcp or Amazon Web Services FreeRTOS-Plus-TCP at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

FreeRTOS-Plus-TCP versions v4.0.0 through v4.3.3 are vulnerable to three distinct memory safety issues when IPv6 is enabled. CVE-2025-11616 and CVE-2025-11617 involve buffer over-reads triggered by ICMPv6 packets smaller than expected or IPv6 packets with incorrect payload length headers. CVE-2025-11618 involves an invalid pointer dereference when processing UDP/IPv6 packets with an incorrect IP version field. These vulnerabilities can be exploited by a remote attacker sending malformed packets over the network without authentication. Successful exploitation can result in a denial of service (system crash) or potential information leakage from the stack. The issues are resolved in version 4.3.4.

Affected products

Amazon Web Services FreeRTOS-Plus-TCP v4.0.0 to v4.3.3

Identifiers

CVE-2025-11618
CVE-2025-11617
CVE-2025-11616

Timeline

2025-10-10: advisory: AWS published security bulletin AWS-2025-023
2025-10-10: patched: Fixed in FreeRTOS-Plus-TCP version 4.3.4

References

https://aws.amazon.com/security/security-bulletins/rss/aws-2025-023/

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