CVE-2026-22213 is a stack-based buffer overflow vulnerability affecting RIOT OS versions up to and including 2026.01-devel-317. The vulnerability is caused by unsafe string concatenation in the devopen() function within the tapslip6 utility. Specifically, this function constructs a device path using unbounded user-controlled input, leading to potential exploitation.
The utility uses strcpy() and strcat() for concatenation without bounds checking. As a result, an attacker may supply an excessively long device name via the -s command-line option, causing a buffer overflow. This can lead to process crashes and memory corruption.
The CVSS score for this vulnerability is 2.4, indicating a low severity level. However, the potential impact on system availability and integrity cannot be overlooked. Organizations running affected versions should prioritize remediation.
Risk to organizations includes process crashes and potential memory corruption that can affect service availability. While the exploitability is classified as low, it is important to address this vulnerability to maintain system integrity.
Vulnerability Details
The vulnerability allows for a stack-based buffer overflow due to unsafe string concatenation in the tapslip6 utility's devopen() function. The CVSS score of 2.4 indicates a low severity level, and the affected product is RIOT OS. The vulnerability was published on January 12, 2026. The relevant CWE classification is CWE-121, indicating an improper control of a resource through its lifetime.
Technical Analysis
The root cause of this vulnerability is the lack of bounds checking when concatenating user-controlled input. The attack vector is local, with low attack complexity as it requires minimal effort from the attacker. The privileges required are low, meaning that any user with access can exploit this vulnerability without needing elevated permissions.
User interaction is required, as the attacker must provide a specially crafted input to trigger the vulnerability. The confidentiality impact is none, while the integrity impact is also none. However, the availability impact is classified as low due to the potential for crashes.
Risk & Impact Analysis
Organizations using affected versions of RIOT OS face risks including process crashes and memory corruption. The blast radius could extend to any application relying on the tapslip6 utility. Given the low CVSS score, urgency for remediation is low, but organizations should still schedule patching to prevent potential exploitation in sensitive environments.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions prior to vendor patch are affected, specifically those matching the following criteria: cpe:2.3:o:riot-os:riot:*:*:*:*:*:*:*:*, cpe:2.3:o:riot-os:riot:2026.01:devel:*:*:*:*:*:*, and cpe:2.3:o:riot-os:riot:2026.01:rc1:*:*:*:*:*:*.
Mitigation & Remediation
Organizations should prioritize patching immediately. It is crucial to apply the latest updates from RIOT OS to remediate this vulnerability. If a patch is unavailable, consider implementing workarounds such as restricting access to the tapslip6 utility and monitoring for unusual behavior.
Detection Guidance
Monitoring system logs for any unusual activity related to the tapslip6 utility is essential. Additionally, organizations should look for behavioral anomalies and network signatures that indicate exploitation attempts.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2026-22213 lies in its demonstration of the vulnerabilities that can arise from poor input handling in software. Security teams must recognize this pattern to prevent similar issues in the future. Regular audits and updates to security practices can help mitigate these risks. For further guidance, organizations should consider engaging in penetration testing and developing a robust security framework.
Organizations should also review their vulnerability management program to ensure it is effective in identifying and responding to vulnerabilities.
In conclusion, CVE-2026-22213 serves as a reminder of the importance of secure coding practices and the need for ongoing vigilance in security management.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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