CVE-2022-50671

A NULL pointer dereference vulnerability was found in the RXE (Soft-RoCE) RDMA driver in the Linux kernel. When rxe_queue_init() fails during queue pair initialization in rxe_qp_init_req(), the task function and argument pointers (qp->req.task.func and qp->req.task.arg) remain uninitialized. The cleanup function rxe_qp_do_cleanup() then attempts to use these uninitialized pointers when calling __rxe_do_task(), causing a kernel NULL pointer dereference.

This is a NULL pointer dereference in the Soft-RoCE RDMA driver that can cause a kernel crash. The vulnerability requires local access and the ability to create RDMA queue pairs, limiting the attack surface to users with RDMA access.

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.

To mitigate this issue, prevent the rdma_rxe module from being loaded. See https://access.redhat.com/solutions/41278 for instructions on how to blacklist a kernel module.