Nvidia Engineer Proposes Linux Kernel Killswitch to Disable Vulnerable Functions Before Patches Land

Nvidia engineer Sasha Levin has introduced a new mechanism for the Linux kernel that allows privileged operators to temporarily disable specific kernel functions. This can be done by returning a fixed value instead of executing the function, serving as a stopgap security measure while official patches are being developed. Levin explained that this "killswitch" enables a privileged operator to make a chosen kernel function return a predetermined value without running its code.