CVE-2026-97484 usbip: vhci_hcd: fix NULL deref in status_show_vhci
A local attacker can cause a kernel crash via NULL pointer dereference in the USBIP vhci_hcd status handler when probe fails.
- 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-2026-97484?
CVE-2026-97484 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:
usbip: vhci_hcd: fix NULL deref in status_show_vhci
platform_get_drvdata() can return NULL if a VHCI host controller's probe failed (e.g. due to USB bus number exhaustion). status_show_vhci() checked for a NULL pdev but not for a NULL hcd returned by platform_get_drvdata(). Passing NULL to hcd_to_vhci_hcd() does not return NULL - it returns a pointer offset of 0x260, causing a NULL pointer dereference when that value is subsequently dereferenced.
Add a NULL check on hcd before calling hcd_to_vhci_hcd(). Move status_show_not_ready() above status_show_vhci() to make it callable from the new error path without a forward declaration.
Which versions are affected by CVE-2026-97484?
How do I fix CVE-2026-97484?
Apply the vendor's patch.
Is CVE-2026-97484 being exploited?
There is no known exploitation of CVE-2026-97484 in the wild and no public exploit code.
Sources
Also known as AZL-104045, BELL-CVE-2026-97484, DEBIAN-CVE-2026-97484, GHSA-gwrg-cchr-q69g, UBUNTU-CVE-2026-97484.