PT-2026-2323 · Riot-Os · Riot-Os

Ron Edgerson · Published 2026-01-12 · Updated 2026-01-21 · CVE-2026-22214

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions RIOT OS versions up to and including 2026.01-devel-317

Description RIOT OS versions up to and including 2026.01-devel-317 have a stack-based buffer overflow issue in the ethos utility. This is due to a lack of bounds checking when handling incoming serial frame data. The issue is present in the handle char() function, where incoming frame bytes are added to a fixed-size stack buffer without ensuring the write index stays within the buffer's limits. An attacker sending specially crafted serial or TCP-framed input can cause the write index to go beyond the buffer size, leading to memory corruption and application crashes.

Recommendations Update RIOT OS to a version newer than 2026.01-devel-317.

Exploit

Fix

Stack Overflow

Weakness Enumeration

CWE-121

Related Identifiers

CVE-2026-22214

Affected Products

Riot-Os

References · 9

• 🔥 https://seclists.org/fulldisclosure/2026/Jan/16 · Exploit
• https://osv.dev/vulnerability/CVE-2026-22214 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-22214 · Security Note
• https://github.com/RIOT-OS/RIOT · Note
• https://t.me/cveNotify/149426 · Telegram Post
• https://vulncheck.com/advisories/riot-os-stack-based-buffer-overflow-in-ethos-serial-frame-parser · Note
• https://twitter.com/VulmonFeeds/status/2010891322601751019 · Twitter Post
• https://twitter.com/CVEnew/status/2010859148637061215 · Twitter Post
• https://riot-os.org · Note