A flaw was found in the QEMU implementation of VMWare's paravirtual RDMA device. This flaw allows a crafted guest driver to allocate and initialize a huge number of page tables to be used as a ring of descriptors for CQ and async events, potentially leading to an out-of-bounds read and crash of QEMU.
https://security.netapp.com/advisory/ntap-20230511-0005/
https://lists.nongnu.org/archive/html/qemu-devel/2023-03/msg00206.html