Vulnerability Description
RIOT OS versions up to and including 2026.01-devel-317 contain a stack-based buffer overflow vulnerability in the ethos utility due to missing bounds checking when processing incoming serial frame data. The vulnerability occurs in the _handle_char() function, where incoming frame bytes are appended to a fixed-size stack buffer without verifying that the current write index remains within bounds. An attacker capable of sending crafted serial or TCP-framed input can cause the current write index to exceed the buffer size, resulting in a write past the end of the stack buffer. This condition leads to memory corruption and application crash.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Riot-Os | Riot | < 2025.10 |
Related Weaknesses (CWE)
References
- https://github.com/RIOT-OS/RIOTProduct
- https://seclists.org/fulldisclosure/2026/Jan/16Mailing ListThird Party Advisory
- https://www.riot-os.org/Product
- https://www.vulncheck.com/advisories/riot-os-stack-based-buffer-overflow-in-ethoThird Party Advisory
FAQ
What is CVE-2026-22214?
CVE-2026-22214 is a vulnerability with a CVSS score of 9.8 (CRITICAL). RIOT OS versions up to and including 2026.01-devel-317 contain a stack-based buffer overflow vulnerability in the ethos utility due to missing bounds checking when processing incoming serial frame dat...
How severe is CVE-2026-22214?
CVE-2026-22214 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-22214?
Check the references section above for vendor advisories and patch information. Affected products include: Riot-Os Riot.