Integer underflow in the DHCPv6 sub-option parser in FreeRTOS-Plus-TCP before V4.4.1 and V4.2.6 allows an adjacent network actor to corrupt the device's IPv6 address assignment, DNS configuration, and lease times, and to cause a denial of service (permanent IP task freeze requiring hardware reset) by sending a single crafted DHCPv6 packet.
The issue is present whenever DHCPv6 is enabled.
To mitigate this issue, users should upgrade to version V4.2.6 or V4.4.1 or newer.
References
| Link | Resource |
|---|---|
| https://aws.amazon.com/security/security-bulletins/2026-022-aws/ | Vendor Advisory |
| https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.2.6 | Release Notes |
| https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.4.1 | Release Notes |
| https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/security/advisories/GHSA-wrhm-c99p-2p8g | Vendor Advisory |
Configurations
Configuration 1 (hide)
|
History
04 May 2026, 13:22
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Amazon freertos-plus-tcp
Amazon |
|
| CPE | cpe:2.3:a:amazon:freertos-plus-tcp:*:*:*:*:*:*:*:* | |
| References | () https://aws.amazon.com/security/security-bulletins/2026-022-aws/ - Vendor Advisory | |
| References | () https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.2.6 - Release Notes | |
| References | () https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.4.1 - Release Notes | |
| References | () https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/security/advisories/GHSA-wrhm-c99p-2p8g - Vendor Advisory |
30 Apr 2026, 15:13
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-04-29 19:16
Updated : 2026-06-17 11:02
NVD link : CVE-2026-7424
Mitre link : CVE-2026-7424
CVE.ORG link : CVE-2026-7424
JSON object : View
Products Affected
amazon
- freertos-plus-tcp
CWE
CWE-191
Integer Underflow (Wrap or Wraparound)