CVE-2026-23348

A flaw was found in the Linux kernel, specifically within the CXL (Compute Express Link) and NVDIMM (Non-Volatile Dual In-line Memory Module) subsystems. A race condition can occur when NVDIMM objects attempt to reprobe after the cxl_acpi module is removed, while the nvdimm_bus object is missing. This can lead to a null pointer dereference, causing the system to crash and resulting in a Denial of Service (DoS).

This flaw affects systems with CXL memory devices and NVDIMM support. The race occurs during module unload/reload sequences when orphaned nvdimm objects reprobe after cxl_acpi removal. The missing nvdimm_bus causes NULL dereference in __nd_device_register(). Primarily affects CXL-capable systems during module operations.

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.