Linux Kernel NVMe PCI DMA Vector Leak Vulnerability in Peer-to-Peer Memory

A vulnerability in the Linux kernel's NVMe PCI driver has been addressed, which involved a memory leak of DMA vector allocations related to peer-to-peer (P2P) memory. The issue arose because P2P memory was not being unmapped, leading to unnecessary tracking and leakage of DMA vectors upon completion. This vulnerability affects the stable version of the Linux kernel.

Impact

The vulnerability could lead to a memory leak, where DMA vector allocations are not properly managed, potentially causing resource exhaustion or other unintended side effects.