CVE-2025-11617

Medium

Description

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.

SeverityMedium

CVSS5.4

Exploit probability—

ProductAmazon Freertos-plus-tcp

PublishedOct 10, 2025

First seenOct 10, 2025

Weakness typeCWE-126CWE-126

How to fix

Update

amazon freertos-plus-tcp4.3.4, 4.2.5 or later

Patches

github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.3.4

Vendor advisories

Affected products

Product	Affected versions	Fixed in
amazon freertos-plus-tcp	4.0.0 ≤ v < 4.3.4, 4.0.0 ≤ v < 4.2.5, 4.3.0 ≤ v < 4.3.4	4.3.4, 4.2.5

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