CVE-2026-22213
CriticalCVSS 9.8Exploitation Probability (EPSS)
Low risk28th percentile - higher than 28% of all known CVEs
Summary
RIOT OS versions up to and including 2026.01-devel-317 contain a stack-based buffer overflow vulnerability in the tapslip6 utility. The vulnerability is caused by unsafe string concatenation in the devopen() function, which constructs a device path using unbounded user-controlled input.
Risk Assessment
An attacker can supply an excessively long device name via the -s option, causing a stack buffer overflow that leads to process crashes and memory corruption, potentially allowing arbitrary code execution.
Recommendation
Update RIOT OS to a version newer than 2026.01-devel-317 that includes the fix. Until then, avoid using the tapslip6 utility with untrusted input.
Original NVD description (English source)
RIOT OS versions up to and including 2026.01-devel-317 contain a stack-based buffer overflow vulnerability in the tapslip6 utility. The vulnerability is caused by unsafe string concatenation in the devopen() function, which constructs a device path using unbounded user-controlled input. The utility uses strcpy() and strcat() to concatenate the fixed prefix '/dev/' with a user-supplied device name provided via the -s command-line option without bounds checking. 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.