CVE-2026-22213CWE-121

RIOT OS <= 2026.01-devel-317 Stack-Based Buffer Overflow in tapslip6 Utility

Low · published January 12, 2026

CVSS v4.0
2.4
EPSS
0%
Percentile
33.4
In the wild
Unconfirmed
What it is

⚠️ A stack-based buffer overflow lives in RIOT OS! The tapslip6 utility can be tricked into a crash by a user-supplied device name that’s just a bit too long. 🔥 Think of it like a restaurant that uses a tiny plate to serve a gigantic pizza. If every customer orders extra-large pizzas (a.k.a. overly long device names), the kitchen gets overwhelmed and everything goes haywire! While this vulnerability isn’t a disaster waiting to happen, it could still lead to process crashes and memory corruption when an attacker inputs an excessively long device name. Imagine the chaos in your system if the tapslip6 utility can’t handle the input!

Put simply

Think of it like a restaurant that uses a tiny plate to serve a gigantic pizza. If every customer orders extra-large pizzas (a.k.a. overly long device names), the kitchen gets overwhelmed and everything goes haywire! This vulnerability stems from unsafe string concatenation in the devopen() function of RIOT OS's tapslip6 utility, where user-controlled input is concatenated without bounds checking, leading to a stack overflow.

What to do

While this vulnerability isn’t a disaster waiting to happen, it could still lead to process crashes and memory corruption when an attacker inputs an excessively long device name. Imagine the chaos in your system if the tapslip6 utility can’t handle the input! To mitigate this issue, ensure you're running a version of RIOT OS beyond 2026.01-devel-317. Additionally, audit the use of strcpy() and strcat() in your code to prevent similar vulnerabilities in the future. You've got this! By staying proactive and patching, you'll keep your system heroes in the game! 🛡️

The record
Technical detail
CVSS v4.0
2.4 · LOW
Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
EPSS
0.00403 · 33.4th percentile
Weakness
CWE-121 · Stack-based Buffer Overflow
Published
2026-01-12T23:03Z
EPSS history
Timeline
  • 12 JAN 23:03Z
    RIOT OS <= 2026.01-devel-317 Stack-Based Buffer Overflow in tapslip6 Utility
    cvelistv5