CVE-2026-22212 TinyOS <= 2.1.2 Stack-Based Buffer Overflow in mcp2200gpio
A local attacker can cause application crashes via stack memory corruption in TinyOS by exploiting unsafe string functions during device discovery.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-22212?
CVE-2026-22212 is a medium-severity memory corruption vulnerability in TinyOS, published on 12 Jan 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
TinyOS versions up to and including 2.1.2 contain a stack-based buffer overflow vulnerability in the mcp2200gpio utility. The vulnerability is caused by unsafe use of strcpy() and strcat() functions when constructing device paths during automatic device discovery. A local attacker can exploit this by creating specially crafted filenames under /dev/usb/, leading to stack memory corruption and application crashes.
Weakness: CWE-121
Which versions are affected by CVE-2026-22212?
How do I fix CVE-2026-22212?
No fix has been published for CVE-2026-22212 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-22212 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-22212 exists.
Sources
Also known as GHSA-x7h6-xxfr-j6pv.