CVE-2026-7422highCWE-290

MAC Address Validation Bypass in FreeRTOS-Plus-TCP IPv4 and IPv6 Packet Processing

21Vexday Risk Score

Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.

ssvc Trackcvss 7.1epss 0.2%

probabilidade de exploração

0.2%top 93% das CVEs

exploração observada

nãonenhuma fonte reporta

Insufficient packet validation in FreeRTOS-Plus-TCP before V4.2.6 and V4.4.1 allows an adjacent network actor to bypass all checksum and minimum-size validation by spoofing the Ethernet source MAC address to match one of the device's own registered endpoints, because the loopback detection mechanism skips all input validation for packets whose source MAC matches a local endpoint. To mitigate this issue, users should upgrade to the fixed version when available.

CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Produtos afetados

AWS · FreeRTOS-Plus-TCP

Referências

https://aws.amazon.com/security/security-bulletins/2026-021-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-jpw4-6h59-62w9