CVE-2026-7425

MEDIUM

Out-of-Bounds Read in Router Advertisement Option Parser in FreeRTOS-Plus-TCP

Title source: cna

Description

Insufficient option length validation in the IPv6 Router Advertisement parser in FreeRTOS-Plus-TCP before V4.2.6 and V4.4.1 allows an adjacent network actor to cause a denial of service (device crash) by sending a crafted Router Advertisement with a truncated PREFIX_INFORMATION option that is smaller than the expected structure size. To mitigate this issue, users should upgrade to the fixed version when available.

References (4)

[Patch] https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.4.1

[Patch] https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.2.6

[Vendor Advisory] https://aws.amazon.com/security/security-bulletins/2026-023-aws/

[Third Party Advisory] https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/security/advisories/GHSA-gffr-xgjg-jh9j

Scores

CVSS v3 6.5

EPSS 0.0001

EPSS Percentile 3.4%

Attack Vector ADJACENT_NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-125

Status published

Products (4)

AWS/FreeRTOS-Plus-TCP 4.0.0 - 4.2.6

AWS/FreeRTOS-Plus-TCP 4.2.6

AWS/FreeRTOS-Plus-TCP 4.3.0 - 4.4.1

AWS/FreeRTOS-Plus-TCP 4.4.1

Published Apr 29, 2026

Tracked Since Apr 30, 2026