CVE-2022-50830 auxdisplay: hd44780: Fix potential memory leak in hd44780_remove()
A memory leak in the Linux kernel hd44780 display driver allows local attackers to cause resource exhaustion and denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-50830?
CVE-2022-50830 is a memory corruption vulnerability in Linux, published on 30 Dec 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
auxdisplay: hd44780: Fix potential memory leak in hd44780_remove()
hd44780_probe() allocates a memory chunk for hd with kzalloc() and makes "lcd->drvdata->hd44780" point to it. When we call hd44780_remove(), we should release all relevant memory and resource. But "lcd->drvdata ->hd44780" is not released, which will lead to a memory leak.
We should release the "lcd->drvdata->hd44780" in hd44780_remove() to fix the memory leak bug.
Which versions are affected by CVE-2022-50830?
How do I fix CVE-2022-50830?
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-2022-50830 being exploited?
There is no known exploitation of CVE-2022-50830 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2022-50830, GHSA-xr5c-xjq3-4hf7, UBUNTU-CVE-2022-50830.