CVE-2026-23213

A flaw was found in the Linux kernel's AMD GPU driver. During a hardware reset cycle, the graphics processor becomes temporarily inaccessible, yet other driver processes may attempt to access its registers concurrently. A local user able to trigger a GPU reset can cause incomplete bus transactions, resulting in a kernel panic or system hang that leads to a Denial of Service (DoS).

This vulnerability is rated as Moderate severity because it requires local access on systems equipped with AMD GPU hardware, and the impact is restricted to a system denial of service. The issue manifests during hardware reset cycles when concurrent register access leads to uncompleted PCIe transactions, triggering a kernel panic or hang. Standard Red Hat Enterprise Linux server environments without AMD graphics hardware or without workloads that trigger GPU resets are not exposed to this risk.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.