CVE-2025-37845 is a use-after-free (UAF) vulnerability in the Linux kernel's tracing subsystem related to fprobe events. The issue arises from improper handling of module reference counts, where a module can be unloaded before a reference is safely acquired, potentially leading to access of freed memory. This vulnerability has been fixed by restoring the call to try_module_get() in the appropriate callback to ensure the module is properly referenced and not freed prematurely.