CVE-2025-68367 macintosh/mac_hid: fix race condition in mac_hid_toggle_emumouse

In the Linux kernel, the following vulnerability has been resolved: macintosh/machid: fix race condition in machidtoggleemumouse The following warning appears when running syzkaller, and this issue also exists in the mainline code. ------------ cut here ------------ listadd double add:...

CVE-2025-68367

CVE-2025-68367 is a Linux kernel race in mac_hid_toggle_emumouse where two processes concurrently write to mac_hid emulation, each reading old_val=0 outside the mutex and both registering the input handler, causing a double list_add. The fix moves the old_val read inside the mutex-protected regio...