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.
Advisories

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Fixes

Solution

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Workaround

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History

Thu, 22 Jan 2026 02:45:00 +0900

Type Values Removed Values Added
CPEs cpe:2.3:o:riot-os:riot:*:*:*:*:*:*:*:*
cpe:2.3:o:riot-os:riot:2026.01:devel:*:*:*:*:*:*
cpe:2.3:o:riot-os:riot:2026.01:rc1:*:*:*:*:*:*
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}


Wed, 14 Jan 2026 04:15:00 +0900

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 13 Jan 2026 18:30:00 +0900

Type Values Removed Values Added
First Time appeared Riot-os
Riot-os riot
Vendors & Products Riot-os
Riot-os riot

Tue, 13 Jan 2026 08:15:00 +0900

Type Values Removed Values Added
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.
Title RIOT OS <= 2026.01-devel-317 Stack-Based Buffer Overflow in tapslip6 Utility
Weaknesses CWE-121
References
Metrics cvssV4_0

{'score': 2.4, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-01-13T18:37:41.785Z

Reserved: 2026-01-06T16:47:17.187Z

Link: CVE-2026-22213

cve-icon Vulnrichment

Updated: 2026-01-13T18:37:37.279Z

cve-icon NVD

Status : Analyzed

Published: 2026-01-12T23:15:52.300

Modified: 2026-01-21T17:44:38.543

Link: CVE-2026-22213

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-01-13T18:27:21Z

Weaknesses