by Kastro
Paper/Archive/CVE-2026-22213

CVE-2026-22213

RIOT RIOT OS — RIOT OS <= 2026.01-devel-317 Stack-Based Buffer Overflow in tapslip6 Utility

EPSS 0.4%public exploitCVSS 9.8
critical.is priorityof 100
46
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 34.5.345 × 206.9Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
RIOT OS≤ 2026.01-devel-317–CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
VulnCheck (CNA)2.4CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: poc · Automatable: no · Technical impact: partial

References

exploitseclists.org/fulldisclosure/2026/Jan/15refriot-os.orgrefgithub.com/RIOT-OS/RIOTwriteupvulncheck.com/advisories/riot-os-stack-based-buffer-overflow-in-tapslip6-utility