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.
Fix
Patch, vendor advisory and mitigation references on NVD 2
- https://aws.amazon.com/security/security-bulletins/AWS-2025-023/ Vendor Advisory
- https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/security/advisories/GHSA-6fh9-mqxj-hmwj Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 5.3 · amazonNVD modified 2026-10-08 13:10
Affected (CPE criteria) 1
cpe:2.3:a:amazon:freertos-plus-tcp:*:*:*:*:*:*:*:*