CVE-2026-22213 RIOT CVE debrief

Who should care

Users of RIOT OS versions up to and including 2026.01-devel-317 should be aware of this vulnerability and take necessary precautions to prevent exploitation. This includes reviewing the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance. Affected operators, platforms, vulnerability-management, and security teams should prioritize patching or mitigating the vulnerability.

Technical summary

The tapslip6 utility in RIOT OS is vulnerable to a stack-based buffer overflow due to unsafe string concatenation in the devopen() function. The function constructs a device path using unbounded user-controlled input provided via the -s command-line option. This allows an attacker to supply an excessively long device name and overflow a fixed-size stack buffer, leading to process crashes and memory corruption. The vulnerability has a CVSS score of 2.4 and a severity of LOW.

Defensive priority

Medium

Recommended defensive actions

• Inventory and assess RIOT OS installations for version 2026.01-devel-317 or earlier
• Apply vendor patches or updates when available
• Implement compensating controls such as input validation and buffer overflow protections
• Monitor for suspicious activity and exception tracking
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record was published on 2026-01-12T23:15:52.300Z and has not been modified since then. The NVD entry is currently Analyzed. There is limited information available about the vulnerability, and defenders should verify the affected scope and severity with the vendor. The tapslip6 utility in RIOT OS versions up to and including 2026.01-devel-317 is vulnerable to a stack-based buffer overflow due to unsafe string concatenation in the devopen() function.

Official resources