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 well_known_core resource coap_well_known_core_default_handler writes user-provided option data and other data into a fixed size buffer without validating the buffer is large enough to contain the response. This vulnerability allows an attacker to corrupt neighboring stack location, including security-sensitive addresses like the return address, leading to denial of service or arbitrary code execution.
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History
Thu, 12 Mar 2026 20:15:00 +0000
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ssvc
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Thu, 12 Mar 2026 10:15:00 +0000
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Riot-os
Riot-os riot |
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Riot-os
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Wed, 11 Mar 2026 20:00:00 +0000
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| Description | 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 well_known_core resource coap_well_known_core_default_handler writes user-provided option data and other data into a fixed size buffer without validating the buffer is large enough to contain the response. This vulnerability allows an attacker to corrupt neighboring stack location, including security-sensitive addresses like the return address, leading to denial of service or arbitrary code execution. | |
| Title | RIOT has an Out-of-Bounds Write in nanoCoAP Handler | |
| Weaknesses | CWE-787 | |
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cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-03-11T19:38:02.866Z
Updated: 2026-03-12T19:53:21.857Z
Reserved: 2026-02-23T17:56:51.202Z
Link: CVE-2026-27703
Updated: 2026-03-12T19:53:18.962Z
Status : Awaiting Analysis
Published: 2026-03-11T20:16:14.990
Modified: 2026-03-12T21:08:22.643
Link: CVE-2026-27703
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