CVE-2022-50809 xhci: dbc: Fix memory leak in xhci_alloc_dbc()
A memory leak in the Linux kernel xHCI DbC driver allows local attackers to exhaust system memory, causing 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-2022-50809?
CVE-2022-50809 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:
xhci: dbc: Fix memory leak in xhci_alloc_dbc()
If DbC is already in use, then the allocated memory for the xhci_dbc struct doesn't get freed before returning NULL, which leads to a memleak.
Which versions are affected by CVE-2022-50809?
How do I fix CVE-2022-50809?
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-2022-50809 being exploited?
There is no known exploitation of CVE-2022-50809 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2022-50809, GHSA-6ph6-qmh9-c936, UBUNTU-CVE-2022-50809.