Kernel-memory disclosure via uncleared message-node padding

Information disclosure in the Linux kernel before 6.4-rc6 allows local users with privileged device access to read kernel memory. vhost_new_msg() allocates a vhost_msg_node with kmalloc() but clears only its msg member, leaving structure padding uninitialized for later delivery. Exploitation requires privileged read access to /dev/vhost-net; the bounded impact is residual kernel-memory disclosure with no reported write or service interruption.