CVE-2026-22214
MEDIUM EPSS 31.4%
Published Jan 12, 20265mo ago · Modified Jun 17, 20262w ago
6.8 CVSS 4.0
Published Jan 12, 2026 5mo ago
Last Modified Jun 17, 2026 2w ago
Description
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 Details
Base Score
Exploitability
Impact
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction A
Scope X
Threat Intelligence
EPSS Exploit Probability
31.4% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-121
Affected Products 3
References 4
- github.com https://github.com/RIOT-OS/RIOT
- seclists.org https://seclists.org/fulldisclosure/2026/Jan/16
- riot-os.org https://www.riot-os.org/
- vulncheck.com https://www.vulncheck.com/advisories/riot-os-stack-based-buffer-overflow-in-ethos-serial-frame-parser
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.