CVE-2026-7426

Insufficient validation of the prefix length field in IPv6 Router Advertisement processing in FreeRTOS-Plus-TCP before V4.2.6 and V4.4.1 allows an adjacent network actor to cause memory corruption by sending a crafted Router Advertisement with a prefix length value exceeding the maximum valid length, resulting in a heap buffer overflow. Users processing IPv4 RA only are not impacted. To mitigate this issue, users should upgrade to the fixed version when available.

CVSS v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.2

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://aws.amazon.com/security/security-bulletins/2026-023-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-97qg-4359-xm3x	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:amazon:freertos-plus-tcp::::::::
	cpe:2.3:a:amazon:freertos-plus-tcp::::::::

History

26 Oct 2026, 20:10

Type	Values Removed	Values Added
Summary		(es) Validación insuficiente del campo de longitud de prefijo en el procesamiento de anuncios de router IPv6 en FreeRTOS-Plus-TCP anterior a V4.2.6 y V4.4.1 permite a un actor de red adyacente causar corrupción de memoria al enviar un anuncio de router manipulado con un valor de longitud de prefijo que excede la longitud máxima válida, lo que resulta en un desbordamiento de búfer de pila. Los usuarios que procesan solo RA de IPv4 no se ven afectados. Para mitigar este problema, los usuarios deberían actualizar a la versión corregida cuando esté disponible.

Information

Published : 2026-04-29 20:16

Updated : 2026-10-26 20:10

NVD link : CVE-2026-7426

Mitre link : CVE-2026-7426

CVE.ORG link : CVE-2026-7426

JSON object : View

Products Affected

amazon

freertos-plus-tcp

CWE

CWE-787

Out-of-bounds Write

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