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CVE-2026-7422

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CVE-2026-7422

Published: Apr 29, 2026

Modified: Apr 29, 2026

PUBLISHED

CVSS v3.1

6.5

MEDIUM

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.

VendorProductVersions

AWS

FreeRTOS-Plus-TCP

affected
4.0.0 - < 4.2.6
affected
4.3.0 - < 4.4.1
unaffected
4.2.6
unaffected
4.4.1

Weaknesses (CWE)

CWE-290

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

References

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