kernel: RDMA/uverbs: Validate wqe_size before using it in ib_uverbs_post_send

A flaw was found in the Linux kernel's Remote Direct Memory Access RDMA subsystem, specifically within the ibuverbspostsend function. A local user can exploit this vulnerability by providing an invalid work queue element size wqesize from userspace without proper validation. This can lead to an...

CVE-2026-45856 RDMA/uverbs: Validate wqe_size before using it in ib_uverbs_post_send

In the Linux kernel, the following vulnerability has been resolved: RDMA/uverbs: Validate wqesize before using it in ibuverbspostsend ibuverbspostsend uses cmd.wqesize from userspace without any validation before passing it to kmalloc and using the allocated buffer as struct ibuverbssendwr. If a...