CVE-2024-56756: In the Linux kernel, the following vulnerability has been resolved: nvme-pci: fix freeing of the HMB descriptor table

A bug in the Linux kernel's NVMe (a fast storage protocol) driver could cause incorrect memory cleanup when the system fails to allocate enough memory for a descriptor table (a list telling the hardware where data is located). The bug doesn't usually cause visible problems because most systems allocate memory in large chunks, but it represents a memory management error that could cause issues in specific scenarios.