CVE-2026-22212

MEDIUM

TinyOS <= 2.1.2 - Stack-based Buffer Overflow in mcp2200gpio Device Path Construction

Title source: llm
STIX 2.1

Description

TinyOS versions up to and including 2.1.2 contain a stack-based buffer overflow vulnerability in the mcp2200gpio utility. The vulnerability is caused by unsafe use of strcpy() and strcat() functions when constructing device paths during automatic device discovery. A local attacker can exploit this by creating specially crafted filenames under /dev/usb/, leading to stack memory corruption and application crashes.

References (3)

Core 3
Core References
Mailing List technical-description exploit
https://seclists.org/fulldisclosure/2026/Jan/14
Various Sources product
https://github.com/tinyos/tinyos-main

Scores

CVSS v4 4.8
EPSS 0.0013
EPSS Percentile 2.7%
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-121
Status published
Products (1)
TinyOS/TinyOS < 2.1.2
Published Jan 12, 2026
Tracked Since Feb 18, 2026