CVE-2026-22214

RIOT OS versions up to and including 2026.01-devel-317 contain a stack-based buffer overflow vulnerability in the ethos utility due to missing bounds checking when processing incoming serial frame data. The vulnerability occurs in the _handle_char() function, where incoming frame bytes are appended to a fixed-size stack buffer without verifying that the current write index remains within bounds. An attacker capable of sending crafted serial or TCP-framed input can cause the current write index to exceed the buffer size, resulting in a write past the end of the stack buffer. This condition leads to memory corruption and application crash.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/RIOT-OS/RIOT	Product
https://seclists.org/fulldisclosure/2026/Jan/16	Mailing List Third Party Advisory
https://www.riot-os.org/	Product
https://www.vulncheck.com/advisories/riot-os-stack-based-buffer-overflow-in-ethos-serial-frame-parser	Third Party Advisory

Configurations

Configuration 1 (hide)

OR	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::::::

History

No history.

Information

Published : 2026-01-12 23:15

Updated : 2026-01-21 17:43

NVD link : CVE-2026-22214

Mitre link : CVE-2026-22214

CVE.ORG link : CVE-2026-22214

JSON object : View

Products Affected

riot-os

riot

CWE

CWE-121

Stack-based Buffer Overflow

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