CVE-2026-43428

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

USB: core: Limit the length of unkillable synchronous timeouts

The usb_control_msg(), usb_bulk_msg(), and usb_interrupt_msg() APIs in

usbcore allow unlimited timeout durations. And since they use

uninterruptible waits, this leaves open the possibility of hanging a

task for an indefinitely long time, with no way to kill it short of

unplugging the target device.

To prevent this sort of problem, enforce a maximum limit on the length

of these unkillable timeouts. The limit chosen here, somewhat

arbitrarily, is 60 seconds. On many systems (although not all) this

is short enough to avoid triggering the kernel's hung-task detector.

In addition, clear up the ambiguity of negative timeout values by

treating them the same as 0, i.e., using the maximum allowed timeout.