CVEvulnerability

CVE-2026-22214

6.8 MEDIUM Published 2026-01-12 Modified 2026-07-14 Official page ↗
Status
Analyzed
Published
2026-01-12
Last modified
2026-07-14
Assigner
[email protected]
CVSS 4.0 ([email protected])
6.8 MEDIUM — 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
CVSS 3.1 ([email protected])
9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-121

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.

Affected configurations

• riot-os riot (< 2025.10) • riot-os riot 2026.01

Related

Weakness · CWE (1)

  • CWE-121 Stack-based Buffer Overflow weakness

References