CVE-2026-97483 usb: core: hcd: fix possible deadlock in rh control transfers
A deadlock in the Linux kernel USB core can cause a denial of service when handling root hub control transfers during device resets.
- 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-2026-97483?
CVE-2026-97483 is a vulnerability in Linux, published on 24 Sep 2026. 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: core: hcd: fix possible deadlock in rh control transfers
>From within the SCSI error handler memory allocations must not trigger IO. Handling errors in UAS and the storage driver may involve resetting a device. The thread doing the reset itself relies on VM magic. However, that is insufficient, as resetting a device involves resuming it. Resumption as well as resetting involves conrol transfers to the parent of the device to be reset. That may be a root hub. Hence usbcore must heed the flags passed to usb_submit_urb() processing control transfers to root hubs.
The problem exist since the storage driver has been merged.
Which versions are affected by CVE-2026-97483?
How do I fix CVE-2026-97483?
Apply the vendor's patch.
Is CVE-2026-97483 being exploited?
There is no known exploitation of CVE-2026-97483 in the wild and no public exploit code.
Sources
Also known as AZL-103880, BELL-CVE-2026-97483, DEBIAN-CVE-2026-97483, GHSA-47j5-5c6r-5qfh, UBUNTU-CVE-2026-97483.