CVE-2026-74390

CVE-2026-74390 affects the Linux kernel’s RDMA/irdma path. The vulnerability stems from an out-of-bounds write in irdma_copy_user_pgaddrs, which iterates over umem DMA blocks to fill PBLEs. When irdma_setup_pbles is called with lvl==0, the loop may not exit properly if palloc->total_cnt == 0, ...