CVE-2026-97484
UnknownSummary
In the usbip vhci_hcd driver, status_show_vhci does not properly check for a NULL value from platform_get_drvdata(). If a VHCI controller probe fails (e.g., due to USB bus number exhaustion), hcd is NULL and hcd_to_vhci_hcd() dereferences a NULL pointer.
Risk Assessment
A local attacker can trigger a kernel crash by causing the NULL dereference, resulting in a denial of service.
Recommendation
Install a kernel patch that adds a NULL check for hcd before calling hcd_to_vhci_hcd() and refactors the error path to use status_show_not_ready().
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS