Vulnerability Description
RIOT OS versions up to and including 2026.01-devel-317 contain a stack-based buffer overflow vulnerability in the tapslip6 utility. The vulnerability is caused by unsafe string concatenation in the devopen() function, which constructs a device path using unbounded user-controlled input. The utility uses strcpy() and strcat() to concatenate the fixed prefix '/dev/' with a user-supplied device name provided via the -s command-line option without bounds checking. This allows an attacker to supply an excessively long device name and overflow a fixed-size stack buffer, leading to process crashes and memory corruption.
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/15ExploitMailing ListThird Party Advisory
- https://www.riot-os.org/Product
- https://www.vulncheck.com/advisories/riot-os-stack-based-buffer-overflow-in-tapsThird Party Advisory
FAQ
What is CVE-2026-22213?
CVE-2026-22213 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 tapslip6 utility. The vulnerability is caused by unsafe string concatenation in the de...
How severe is CVE-2026-22213?
CVE-2026-22213 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-2026-22213?
Check the references section above for vendor advisories and patch information. Affected products include: Riot-Os Riot.