Linux Kernel RDMA/rxe Null Pointer Dereference Vulnerability

A null pointer dereference vulnerability has been identified in the Linux kernel's RDMA/rxe component. This issue arises in the 'rxe_qp_do_cleanup' function, which is called by 'rxe_put' after the 'rxe_create_qp' function initializes a queue pair (QP). If an error occurs during initialization, the QP's send and receive completion queues are set to NULL. The cleanup function then accesses these queues without checking for NULL values first, leading to a dereference of a null pointer and a potential crash. This vulnerability affects several versions of the Linux kernel.

Impact

Exploitation of this vulnerability leads to a null pointer dereference, causing a kernel crash.