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...

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...

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-2026-33453

camel-coap Header Injection → RCE Vulnerability Reproducer CVE-2026-33453 This project demonstrates a Camel message header injection vulnerability in Apache Camel's camel-coap component, tracked as CVE-2026-33453. An unauthenticated attacker who can send a single CoAP UDP packet can inject...

CVE-2026-107838

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, nanocoapfileserver callers in sys/net/applicationlayer/nanocoap/fileserver.c ignore a failure returned by respinit when...

CVE-2026-107838 RIOT: nanocoap_fileserver ignores response initialization failure, leading to reachable assertion

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, nanocoapfileserver callers in sys/net/applicationlayer/nanocoap/fileserver.c ignore a failure returned by respinit when...

CVE-2026-107838

The RIOT microcontroller operating system (versions 2023.07 through 2026.07 ) is vulnerable to a reachable assertion in the nanocoap_fileserver component. The root cause is that callers in sys/net/application_layer/nanocoap/fileserver.c ignore a failure returned by _resp_init() when coap_build_re...

CVE-2026-107838 RIOT: nanocoap_fileserver ignores response initialization failure, leading to reachable assertion

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, nanocoapfileserver callers in sys/net/applicationlayer/nanocoap/fileserver.c ignore a failure returned by respinit when...

EUVD-2026-95931

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-2026-18746

parsewriteop in subsys/net/lib/lwm2m/lwm2mmessagehandling.c handles inbound CoAP WRITE/CREATE requests that carry a Block1 option. For the first block of a transfer it called initblockctx and then immediately stored the peer-selected block size with blockctx-ctx.blocksize = blocksize before...

CVE-2026-18746: NULL Pointer Dereference

parsewriteop in subsys/net/lib/lwm2m/lwm2mmessagehandling.c handles inbound CoAP WRITE/CREATE requests that carry a Block1 option. For the first block of a transfer it called initblockctx and then immediately stored the peer-selected block size with blockctx-ctx.blocksize = blocksize before...

EUVD-2026-88574

parsewriteop in subsys/net/lib/lwm2m/lwm2mmessagehandling.c handles inbound CoAP WRITE/CREATE requests that carry a Block1 option. For the first block of a transfer it called initblockctx and then immediately stored the peer-selected block size with blockctx-ctx.blocksize = blocksize before...

CVE-2026-18746 NULL pointer dereference in Zephyr LwM2M client when the CoAP Block1 context pool is exhausted

parsewriteop in subsys/net/lib/lwm2m/lwm2mmessagehandling.c handles inbound CoAP WRITE/CREATE requests that carry a Block1 option. For the first block of a transfer it called initblockctx and then immediately stored the peer-selected block size with blockctx-ctx.blocksize = blocksize before...

CVE-2026-18746

The Zephyr LwM2M client is vulnerable to a NULL pointer dereference in the parse_write_op() function within subsys/net/lib/lwm2m/lwm2m_message_handling.c. When the static CoAP Block1 context pool (defaulting to 3 entries) is exhausted, the init_block_ctx() function returns -ENOMEM and sets the ca...

CVE-2026-18746 NULL pointer dereference in Zephyr LwM2M client when the CoAP Block1 context pool is exhausted

parsewriteop in subsys/net/lib/lwm2m/lwm2mmessagehandling.c handles inbound CoAP WRITE/CREATE requests that carry a Block1 option. For the first block of a transfer it called initblockctx and then immediately stored the peer-selected block size with blockctx-ctx.blocksize = blocksize before...

CVE-2026-18416

The CoAP link-format helper matchpathuri in subsys/net/lib/coap/coaplinkformat.c compares a registered resource path against the URI carried in a Uri-Query href= option. That URI is not NUL terminated, but the inner character loop advanced its index k once per path character without ever testing ...

CVE-2026-18416 Out-of-bounds read in CoAP well-known-core Uri-Query href matching (match_path_uri)

The CoAP link-format helper matchpathuri in subsys/net/lib/coap/coaplinkformat.c compares a registered resource path against the URI carried in a Uri-Query href= option. That URI is not NUL terminated, but the inner character loop advanced its index k once per path character without ever testing ...

CVE-2026-18416

The Zephyr RTOS CoAP server subsystem is vulnerable to an out-of-bounds read in the match_path_uri() helper function located in subsys/net/lib/coap/coap_link_format.c. This occurs because the function compares a registered resource path against a Uri-Query href= option without properly checking t...

CVE-2026-18416 Out-of-bounds read in CoAP well-known-core Uri-Query href matching (match_path_uri)

The CoAP link-format helper matchpathuri in subsys/net/lib/coap/coaplinkformat.c compares a registered resource path against the URI carried in a Uri-Query href= option. That URI is not NUL terminated, but the inner character loop advanced its index k once per path character without ever testing ...

CVE-2026-18416 Out-of-bounds read in CoAP well-known-core Uri-Query href matching (match_path_uri)

The CoAP link-format helper matchpathuri in subsys/net/lib/coap/coaplinkformat.c compares a registered resource path against the URI carried in a Uri-Query href= option. That URI is not NUL terminated, but the inner character loop advanced its index k once per path character without ever testing ...