Vulnerability Description
TinyOS versions up to and including 2.1.2 contain a global buffer overflow vulnerability in the printfUART formatted output implementation used within the ZigBee / IEEE 802.15.4 networking stack. The implementation formats output into a fixed-size global buffer and concatenates strings for %s format specifiers using strcat() without verifying remaining buffer capacity. When printfUART is invoked with a caller-controlled string longer than the available space, the unbounded sprintf/strcat sequence writes past the end of debugbuf, resulting in global memory corruption. This can cause denial of service, unintended behavior, or information disclosure via corrupted adjacent global state or UART output.
Related Weaknesses (CWE)
References
- https://github.com/tinyos/tinyos-main
- https://seclists.org/fulldisclosure/2026/Jan/14
- https://www.vulncheck.com/advisories/tinyos-global-buffer-overflow-in-printfuart
FAQ
What is CVE-2026-22211?
CVE-2026-22211 is a documented vulnerability. TinyOS versions up to and including 2.1.2 contain a global buffer overflow vulnerability in the printfUART formatted output implementation used within the ZigBee / IEEE 802.15.4 networking stack. The ...
How severe is CVE-2026-22211?
CVSS scoring is not yet available for CVE-2026-22211. Check NVD for updates.
Is there a patch for CVE-2026-22211?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.