CVE Watch16 de out. de 2026

CVE-2026-107838

RIOT is an open-source microcontroller operating system designed for Internet of Things devices and other embedded systems. From version 202

CVSS

7.5

Alta

EPSS

0.3%

p27

KEV

—

Exploit Today

0-100

Publicado: 9 de out. de 2026 · Última mod.: 16 de out. de 2026 · CWE-252 · CWE-617

EPSS · 30d

0.3%EPSS · 30 dias0.3%

2026-10-102026-11-05

Descrição técnica

RIOT is an open-source microcontroller operating system designed for Internet of Things devices and other embedded systems. From version 2023.07 through version 2026.07, nanocoap_fileserver callers in sys/net/application_layer/nanocoap/fileserver.c ignore a failure returned by _resp_init() when coap_build_reply() cannot fit a response header into the response buffer. A remote client can send a CoAP request with a sufficiently large extended token when nanocoap_token_ext is enabled, causing response initialization to fail while _get_file() or _get_directory() continues with stale response state. The path then reaches _calc_szx2() and its pdu->payload_len > reserve assertion, terminating the affected service or device task. No fixed release is available as of this review.

Referências oficiais

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