Why are my CPU temps going up?

I just tried the fork bomb on Termux. That was way more effective than I expected. It actually crashed the whole system. Even my smart band disconnected, so basically everything had to die. No response to short pressing power button.

I thought Android would have some better process management. Apparently not. It’s scary that an app can crash the whole system so easily.

Meanwhile when I tried it on Linux Mint, the DE just restarted after a minute, killing the processes.