CVE-2022-50557 pinctrl: thunderbay: fix possible memory leak in thunderbay_build_functions()
A memory leak in the Linux kernel Thunderbay pinctrl driver can lead to resource exhaustion and denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Not stated
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-50557?
CVE-2022-50557 is a memory corruption vulnerability in Linux, published on 22 Oct 2025.
Official description
In the Linux kernel, the following vulnerability has been resolved:
pinctrl: thunderbay: fix possible memory leak in thunderbay_build_functions()
The thunderbay_add_functions() will free memory of thunderbay_funcs when everything is ok, but thunderbay_funcs will not be freed when thunderbay_add_functions() fails, then there will be a memory leak, so we need to add kfree() when thunderbay_add_functions() fails to fix it.
In addition, doing some cleaner works, moving kfree(funcs) from thunderbay_add_functions() to thunderbay_build_functions().
Which versions are affected by CVE-2022-50557?
How do I fix CVE-2022-50557?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2022-50557 being exploited?
There is no known exploitation of CVE-2022-50557 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2022-50557, GHSA-hjpq-cx8h-9x2f, UBUNTU-CVE-2022-50557.