high8.1
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 net…
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Amazon | Freertos-Plus-Tcp | from 4.0.0 before 4.2.6 from 4.3.0 before 4.4.1 |
Weakness classification
References
- NVD record
- CVE.org record
- https://aws.amazon.com/security/security-bulletins/2026-023-aws/
- https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.2.6
- https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.4.1
- https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/security/advisories/GHSA-97qg-4359-xm3x