Linux Kernel PCI Power Management Vulnerability on TUXEDO Sirius Gen 1

A vulnerability in the Linux kernel's PCI power management can cause system hangs on the TUXEDO Sirius 16 Gen 1, due to an interaction with a specific old BIOS. The issue arises because a recent change allows all PCIe ports to enter a low-power state during suspension, which can disrupt the wake-up process on this particular device and BIOS combination. The problem can be resolved by adding a quirk to prevent the affected root ports from entering the low-power state during suspend.

Impact

The vulnerability can lead to system hangs when waking up from suspend on the affected device and BIOS combination.

Remediation

Users can apply a patch that adds a quirk for the root port of the problematic controller, ensuring that these ports are not put into a low-power state during suspend. This patch is available in the Linux kernel.