CVE-2025-68750 usb: potential integer overflow in usbg_make_tpg()
An integer overflow in the Linux kernel USB gadget subsystem allows local attackers to potentially escalate privileges or execute code.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-68750?
CVE-2025-68750 is a 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:
usb: potential integer overflow in usbg_make_tpg()
The variable tpgt in usbg_make_tpg() is defined as unsigned long and is assigned to tpgt->tport_tpgt, which is defined as u16. This may cause an integer overflow when tpgt is greater than USHRT_MAX (65535). I haven't tried to trigger it myself, but it is possible to trigger it by calling usbg_make_tpg() with a large value for tpgt.
I modified the type of tpgt to match tpgt->tport_tpgt and adjusted the relevant code accordingly.
This patch is similar to commit 59c816c1f24d ("vhost/scsi: potential memory corruption").
Which versions are affected by CVE-2025-68750?
How do I fix CVE-2025-68750?
Apply the vendor's patch.
Is CVE-2025-68750 being exploited?
There is no known exploitation of CVE-2025-68750 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2025-68750, DEBIAN-CVE-2025-68750, GHSA-475m-mm7r-j479, UBUNTU-CVE-2025-68750.