Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 14.5%
CVSS Severity
CVSS v3 Score 9.8
References
Products affected by CVE-2026-22214
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cpe:2.3:o:riot-os:riot:2013.08
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cpe:2.3:o:riot-os:riot:2014.01
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cpe:2.3:o:riot-os:riot:2014.05
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cpe:2.3:o:riot-os:riot:2014.12
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cpe:2.3:o:riot-os:riot:2015.09
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cpe:2.3:o:riot-os:riot:2015.12
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cpe:2.3:o:riot-os:riot:2016.04
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cpe:2.3:o:riot-os:riot:2016.07
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cpe:2.3:o:riot-os:riot:2016.10
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cpe:2.3:o:riot-os:riot:2017.01
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cpe:2.3:o:riot-os:riot:2017.04
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cpe:2.3:o:riot-os:riot:2017.07
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cpe:2.3:o:riot-os:riot:2017.10
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cpe:2.3:o:riot-os:riot:2018.01
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cpe:2.3:o:riot-os:riot:2018.04
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cpe:2.3:o:riot-os:riot:2018.07
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cpe:2.3:o:riot-os:riot:2018.10
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cpe:2.3:o:riot-os:riot:2018.10.1
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cpe:2.3:o:riot-os:riot:2019.01
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cpe:2.3:o:riot-os:riot:2019.04
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cpe:2.3:o:riot-os:riot:2019.07
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cpe:2.3:o:riot-os:riot:2019.10
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cpe:2.3:o:riot-os:riot:2020.01
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cpe:2.3:o:riot-os:riot:2020.01.1
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cpe:2.3:o:riot-os:riot:2020.04
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cpe:2.3:o:riot-os:riot:2021.01
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cpe:2.3:o:riot-os:riot:2021.04
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cpe:2.3:o:riot-os:riot:2021.07
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cpe:2.3:o:riot-os:riot:2021.10
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cpe:2.3:o:riot-os:riot:2022.01
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cpe:2.3:o:riot-os:riot:2022.04
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cpe:2.3:o:riot-os:riot:2022.07
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cpe:2.3:o:riot-os:riot:2022.10
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cpe:2.3:o:riot-os:riot:2023.01
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cpe:2.3:o:riot-os:riot:2023.04
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cpe:2.3:o:riot-os:riot:2023.07
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cpe:2.3:o:riot-os:riot:2023.10
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cpe:2.3:o:riot-os:riot:2024.01
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cpe:2.3:o:riot-os:riot:2024.04
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cpe:2.3:o:riot-os:riot:2024.07
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cpe:2.3:o:riot-os:riot:2024.10
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cpe:2.3:o:riot-os:riot:2025.01
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cpe:2.3:o:riot-os:riot:2025.04
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cpe:2.3:o:riot-os:riot:2025.07
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cpe:2.3:o:riot-os:riot:2026.01