The Module Manager's object lookup validated one byte of a memory-protected module's search name and then walked as much of it as the module declared, in privileged mode, with the kernel's preemption count raised. Both lookup dispatchers are affected: the recommended "txm_module_object_pointer_get_extended" is handed a length and does not use it to bound the buffer, and the deprecated "txm_module_object_pointer_get" supplies the largest value a "UINT" can hold, so it removes the bound rather than lacking one. A module can make the walk unbounded without knowing anything about the memory it reaches, and where the walk reaches memory a privileged read cannot take, the resulting fault leaves the kernel unable to preempt for the rest of the system's life. Vulnerable functions: "_txm_module_manager_txm_module_object_pointer_get_dispatch", "_txm_module_manager_txm_module_object_pointer_get_extended_dispatch" (both in "common_modules/module_manager/inc/txm_module_manager_dispatch.h") and "_txm_module_manager_object_name_compare" ("common_modules/module_manager/src/txm_module_manager_util.c").