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CVE-2026-7422CVE-2026-7423

Issue with FreeRTOS-Plus-TCP - MAC Address Validation Bypass and ICMP Echo Reply Integer Underflow

Bulletin ID: 2026-021-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 2026/04/29 12:00 PM PDT Description: FreeRTOS-Plus-TCP is a scalable, open source, and thread-safe TCP/IP stack for FreeRTOS. - CVE-2026-7422: Insufficient packet validation in the IPv4 and IPv6 receive paths allows an adjacent network device to send a packet that bypasses checksum and minimum-size validation by spoofing the Ethernet source MAC address to match one of the target device's own regis

Wednesday, April 29, 2026AWSVulnios Threat Intelligence
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Executive Summary

Bulletin ID: 2026-021-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 2026/04/29 12:00 PM PDT Description: FreeRTOS-Plus-TCP is a scalable, open source, and thread-safe TCP/IP stack for FreeRTOS. - CVE-2026-7422: Insufficient packet validation in the IPv4 and IPv6 receive paths allows an adjacent network device to send a packet that bypasses checksum and minimum-size validation by spoofing the Ethernet source MAC address to match one of the target device's own regis

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