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CVE-2026-7426

HIGH

8.1

Description

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.

Details CVE

Score CVSS v3.18.1

SeveriteHIGH

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

Vecteur d'attaqueADJACENT_NETWORK

ComplexiteLOW

Privileges requisNONE

Interaction utilisateurNONE

Publie4/29/2026

Derniere modification5/4/2026

Sourcenvd

Observations honeypot0

Produits affectes

amazon:freertos-plus-tcp

Faiblesses (CWE)

CWE-787

References

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

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

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

https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/security/advisories/GHSA-97qg-4359-xm3x(ff89ba41-3aa1-4d27-914a-91399e9639e5)

Correlations IOC

Aucune correlation enregistree

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