CVE-2023-54083 phy: tegra: xusb: Clear the driver reference in usb-phy dev
A use-after-free vulnerability in the Linux kernel's Tegra XUSB PHY driver allows attackers to potentially execute code or cause a system crash.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-54083?
CVE-2023-54083 is a high-severity use after free vulnerability in Linux, published on 24 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:
phy: tegra: xusb: Clear the driver reference in usb-phy dev
For the dual-role port, it will assign the phy dev to usb-phy dev and use the port dev driver as the dev driver of usb-phy.
When we try to destroy the port dev, it will destroy its dev driver as well. But we did not remove the reference from usb-phy dev. This might cause the use-after-free issue in KASAN.
Which versions are affected by CVE-2023-54083?
How do I fix CVE-2023-54083?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2023-54083 being exploited?
There is no known exploitation of CVE-2023-54083 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2023-54083, DEBIAN-CVE-2023-54083, GHSA-mr7q-47cq-r2xm, UBUNTU-CVE-2023-54083.