You can’t change secure boot settings from the OS, even with root. You need the signing keys or to be in BIOS (if it’s configured correctly), which shouldn’t be on the device.
Now if the right kernel exploit and a secure boot exploit are chained together then it’s possible. But at the point, you’re gonna be hosed no matter what you do.
Now if the right kernel exploit and a secure boot exploit are chained together then it’s possible. But at the point, you’re gonna be hosed no matter what you do.