CVE-2026-72403

In the Linux kernel, the following vulnerability has been resolved:

ALSA: FCP: Fix NULL pointer dereference in interface lookup

A malformed USB device can provide a vendor-specific interface without

any endpoint descriptors. fcp_find_fc_interface() currently selects the

first vendor-specific interface and reads endpoint 0 from it, without

checking whether the interface actually has any endpoints.

When bNumEndpoints is zero, no endpoint array is allocated for the parsed

alternate setting, so get_endpoint(..., 0) yields an invalid endpoint

descriptor pointer. Dereferencing it through usb_endpoint_num() then

triggers a NULL pointer dereference.

Skip vendor-specific interfaces that do not have any endpoints.