pci topology

The pci topology tag covers discussions about the physical and logical arrangement of PCI devices on a system's bus, including rare configurations that can trigger driver bugs. A featured thread examines CVE-2026-46092, a Linux kernel vulnerability in the rtw88 RTL8821CE Wi-Fi driver that causes a crash when the device is connected directly to a PCI root bus. This highlights how unusual PCI topologies can expose assumptions in driver code, leading to stability or security issues. The tag is relevant for users working with non-standard hardware, repurposed wireless cards, or enterprise fleets where uncommon bus layouts may cause failures. Topics include kernel patches, driver behavior, and hardware compatibility testing.