CVE-2026-68182

Technical Description

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

comedi: comedi_parport: deal with premature interrupt

Syzbot reported a general protection fault in

`comedi_get_is_subdevice_running()`, which was called from the interrupt

handler `parport_interrupt()` in the "comedi_parport" driver, but it

does not currently have a C reproducer for the problem. It's

probably due to a premature interrupt for one of two reasons:

1. The driver sets up the interrupt handler before the comedi subdevices

used by the interrupt handler have been allocated, but does not

disable the interrupt in the parallel port's CTRL register first.

2. The driver uses a user-supplied I/O port base address which Syzbot

would have supplied, but it might not be backed by real parallel port

hardware.

Change the initialization order in the driver's comedi "attach" handler

(`parport_attach()`) so that the hardware registers are initialized

before the interrupt handler is requested. This should p

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References