CVE-2026-23082 can: gs_usb: gs_usb_receive_bulk_callback(): unanchor URL on usb_submit_urb() error
A logic error in the Linux kernel gs_usb CAN driver causes an infinite loop during device close if URB submission fails, leading to denial of service.
- 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-2026-23082?
CVE-2026-23082 is a medium-severity denial of service vulnerability in Linux kernel, published on 4 Feb 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:
can: gs_usb: gs_usb_receive_bulk_callback(): unanchor URL on usb_submit_urb() error
In commit 7352e1d5932a ("can: gs_usb: gs_usb_receive_bulk_callback(): fix URB memory leak"), the URB was re-anchored before usb_submit_urb() in gs_usb_receive_bulk_callback() to prevent a leak of this URB during cleanup.
However, this patch did not take into account that usb_submit_urb() could fail. The URB remains anchored and usb_kill_anchored_urbs(&parent->rx_submitted) in gs_can_close() loops infinitely since the anchor list never becomes empty.
To fix the bug, unanchor the URB when an usb_submit_urb() error occurs, also print an info message.
Weakness: CWE-835
Which versions are affected by CVE-2026-23082?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-23082?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-23082 being exploited?
There is no known exploitation of CVE-2026-23082 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-23082, GHSA-m8p7-hjg2-3xqj, UBUNTU-CVE-2026-23082.