FKIE_CVE-2026-27703

Vulnerability from fkie_nvd - Published: 2026-03-11 20:16 - Updated: 2026-03-16 20:19
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
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.
References
security-advisories@github.comhttps://github.com/RIOT-OS/RIOT/security/advisories/GHSA-qgj4-9jff-93cjExploit, Vendor Advisory
Impacted products
Vendor Product Version
riot-os riot *
To clipboard 

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  "lastModified": "2026-03-16T20:19:49.037",
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Detection rules are retrieved from Rulezet.