CVE-2023-54323

In the Linux kernel, the following vulnerability has been resolved: cxl/pmem: Fix nvdimm registration races A loop of the form: while true; do modprobe cxlpci; modprobe -r cxlpci; done ...fails with the following crash signature: BUG: kernel NULL pointer dereference, address: 0000000000000040...

CVE-2023-54323 cxl/pmem: Fix nvdimm registration races

In the Linux kernel, the following vulnerability has been resolved: cxl/pmem: Fix nvdimm registration races A loop of the form: while true; do modprobe cxlpci; modprobe -r cxlpci; done ...fails with the following crash signature: BUG: kernel NULL pointer dereference, address: 0000000000000040...

CVE-2023-54323

CVE-2023-54323 affects the Linux kernel (cxl_pmem/nvdimm path). The root cause is a race where bottom-half async nvdimm registration runs after CXL teardown, leading to a NULL dereference in cxl_internal_send_cmd. The issue occurs during cxl/pmem registration races when a loop modprobing cxl_pci ...