CVE-2026-7425

medium

Published 2026-04-29 · Modified 2026-05-04

CVSS v3

6.5

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

CVSS v2

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VIR risk

6.5

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.

Predictions

Exploit likelihood

65%

Patch ETA

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Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: ff89ba41-3aa1-4d27-914a-91399e9639e5 — https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/security/advisories/GHSA-gffr-xgjg-jh9j

vendor Authored 2026-05-27

Vendor advisory: ff89ba41-3aa1-4d27-914a-91399e9639e5 — https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.4.1

vendor Authored 2026-05-27

Vendor advisory: ff89ba41-3aa1-4d27-914a-91399e9639e5 — https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.2.6

vendor Authored 2026-05-27

Vendor advisory: ff89ba41-3aa1-4d27-914a-91399e9639e5 — https://aws.amazon.com/security/security-bulletins/2026-023-aws/

Application impact

Vendor	Product	Versions	Fixed
amazon	freertos-plus-tcp	`{"startIncluding":"4.0.0","endExcluding":"4.2.6"}`	`4.2.6`

References

CWEs

CWE-125

Verify integrity in audit chain (admin only). AS-IS.