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VULNERABILITIES

CVE-2026-7422 Details

Description

Insufficient packet validation in FreeRTOS-Plus-TCP before V4.2.6 and V4.4.1 allows an adjacent network actor to bypass all checksum and minimum-size validation by spoofing the Ethernet source MAC address to match one of the device's own registered endpoints, because the loopback detection mechanism skips all input validation for packets whose source MAC matches a local endpoint. To mitigate this issue, users should upgrade to the fixed version when available.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: AMZNCVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URLSource(s)Tag(s)
https://aws.amazon.com/security/security-bulletins/2026-021-aws/ AMZNVendor Advisory
https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.2.6 AMZNRelease Notes
https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.4.1 AMZNRelease Notes
https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/security/advisories/GHSA-jpw4-6h59-62w9 AMZNPatchVendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-290Authentication Bypass by SpoofingAMZN

Affected Products

ProductVersions
amazon freertos-plus-tcp
>= 4.0.0, < 4.2.6
>= 4.3.0, < 4.4.1

CPE

  • cpe:2.3:a:amazon:freertos-plus-tcp:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

4 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-7422
NVD Published Date:
Apr 29, 2026
NVD Last Modified:
Jun 17, 2026
Source:
AMZN
CVE-2026-7422 Details - Not Deferred