VULNERABILITY INTELLIGENCE

CVE-2026-7426

CVSS score8.1 HIGH
EPSS probability0.25%
CISA KEVNot currently listed
Published2026-04-29
Last modified2026-10-26
CVSS vectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

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.

Weakness classification

  • ff89ba41-3aa1-4d27-914a-91399e9639e5: CWE-787

Primary references