CVE-2026-102692

RIOT is an open-source microcontroller operating system designed for Internet of Things devices and other embedded systems. Prior to 2026.07, nanocoap accepts oversized CoAP Block2 option values without enforcing the 20-bit maximum block number, allowing block offset multiplication to overflow on...

CVE-2026-102692 RIOT: Potential integer overflow in nanocoap Block2 handling leading to out-of-bounds memory access

RIOT is an open-source microcontroller operating system designed for Internet of Things devices and other embedded systems. Prior to 2026.07, nanocoap accepts oversized CoAP Block2 option values without enforcing the 20-bit maximum block number, allowing block offset multiplication to overflow on...

CVE-2026-102692

RIOT is an open-source microcontroller operating system designed for Internet of Things devices and other embedded systems. Prior to 2026.07, nanocoap accepts oversized CoAP Block2 option values without enforcing the 20-bit maximum block number, allowing block offset multiplication to overflow on...

CVE-2026-102692 RIOT: Potential integer overflow in nanocoap Block2 handling leading to out-of-bounds memory access

RIOT is an open-source microcontroller operating system designed for Internet of Things devices and other embedded systems. Prior to 2026.07, nanocoap accepts oversized CoAP Block2 option values without enforcing the 20-bit maximum block number, allowing block offset multiplication to overflow on...

EUVD-2026-102945

RIOT is an open-source microcontroller operating system designed for Internet of Things devices and other embedded systems. Prior to 2026.07, nanocoap accepts oversized CoAP Block2 option values without enforcing the 20-bit maximum block number, allowing block offset multiplication to overflow on...

CVE-2026-102692 RIOT: Potential integer overflow in nanocoap Block2 handling leading to out-of-bounds memory access

RIOT is an open-source microcontroller operating system designed for Internet of Things devices and other embedded systems. Prior to 2026.07, nanocoap accepts oversized CoAP Block2 option values without enforcing the 20-bit maximum block number, allowing block offset multiplication to overflow on...

CVE-2026-102692

The RIOT microcontroller operating system contains an integer overflow vulnerability in the nanocoap component prior to version 2026.07 . Specifically, the software fails to enforce a 20-bit maximum block number when handling CoAP Block2 option values. This allows oversized values to pass from co...

PT-2026-115661

RIOT is an open-source microcontroller operating system designed for Internet of Things devices and other embedded systems. Prior to 2026.07, nanocoap accepts oversized CoAP Block2 option values without enforcing the 20-bit maximum block number, allowing block offset multiplication to overflow on...

CVE-2026-102692: Integer Overflow or Wraparound

RIOT is an open-source microcontroller operating system designed for Internet of Things devices and other embedded systems. Prior to 2026.07, nanocoap accepts oversized CoAP Block2 option values without enforcing the 20-bit maximum block number, allowing block offset multiplication to overflow on...

RIOT OS Digital Error Vulnerability

Versions of Riot OS prior to 2026.07 contain security vulnerabilities. These vulnerabilities stem from nanocoap not enforcing a 20-bit maximum block number limit for the extremely large CoAP Block2 option values. This allows for overflow during block offset multiplication on 32-bit targets,...

CVE-2026-107836 RIOT: nanoCoAP Block2 client slice handling underflows on inconsistent server-controlled block size

RIOT is an open-source microcontroller operating system designed for Internet of Things devices and other embedded systems. In 2026.07 and earlier, the nanoCoAP client function nanocoapsockgetslice in sys/net/applicationlayer/nanocoap/sock.c accepts a Block2 response when blockcb sees the expecte...

CVE-2026-107836

The RIOT microcontroller operating system (version 2026.07 and earlier ) contains a vulnerability in the nanoCoAP client function nanocoap_sock_get_slice() located in sys/net/application_layer/nanocoap/sock.c. The root cause is a failure to verify that server-controlled szx and derived offsets ma...

CVE-2026-107836 RIOT: nanoCoAP Block2 client slice handling underflows on inconsistent server-controlled block size

RIOT is an open-source microcontroller operating system designed for Internet of Things devices and other embedded systems. In 2026.07 and earlier, the nanoCoAP client function nanocoapsockgetslice in sys/net/applicationlayer/nanocoap/sock.c accepts a Block2 response when blockcb sees the expecte...

CVE-2026-107836 RIOT: nanoCoAP Block2 client slice handling underflows on inconsistent server-controlled block size

RIOT is an open-source microcontroller operating system designed for Internet of Things devices and other embedded systems. In 2026.07 and earlier, the nanoCoAP client function nanocoapsockgetslice in sys/net/applicationlayer/nanocoap/sock.c accepts a Block2 response when blockcb sees the expecte...

PT-2026-109284

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...

CVE-2026-107836: Out-of-bounds Read

RIOT is an open-source microcontroller operating system designed for Internet of Things devices and other embedded systems. In 2026.07 and earlier, the nanoCoAP client function nanocoapsockgetslice in sys/net/applicationlayer/nanocoap/sock.c accepts a Block2 response when blockcb sees the expecte...

PT-2026-109282

RIOT is an open-source microcontroller operating system designed for Internet of Things devices and other embedded systems. In 2026.07 and earlier, the nanoCoAP client function nanocoap sock get slice in sys/net/application layer/nanocoap/sock.c accepts a Block2 response when block cb sees the...

CVE-2026-27703 RIOT has an Out-of-Bounds Write in nanoCoAP Handler

RIOT is an open-source microcontroller operating system, designed to match the requirements of Internet of Things IoT devices and other embedded devices. In 2026.01 and earlier, the default handler for the wellknowncore resource coapwellknowncoredefaulthandler writes user-provided option data and...

CVE-2026-27703 RIOT has an Out-of-Bounds Write in nanoCoAP Handler

RIOT is an open-source microcontroller operating system, designed to match the requirements of Internet of Things IoT devices and other embedded devices. In 2026.01 and earlier, the default handler for the wellknowncore resource coapwellknowncoredefaulthandler writes user-provided option data and...

CVE-2026-27703 RIOT has an Out-of-Bounds Write in nanoCoAP Handler

RIOT is an open-source microcontroller operating system, designed to match the requirements of Internet of Things IoT devices and other embedded devices. In 2026.01 and earlier, the default handler for the wellknowncore resource coapwellknowncoredefaulthandler writes user-provided option data and...