SPARC has memory tagging support since M7.

https://swisdev.oracle.com/_files/What-Is-ADI.html

https://swisdev.oracle.com/_files/M7_Preso.pdf

This is enabled by default in Solaris since version 11.

"Secure Software - Made Simple with Software in Silicon"

https://www.youtube.com/watch?v=krOhcjF5Fsw

https://lazytyped.blogspot.com/2016/12/hardware-buffer-overf...

ARM v8.5 memory tagging extensions aims to try to achieve parity with it.

https://www.youtube.com/watch?v=IbisEjzoxTY

Google is planning to make use of them on the native layer of Android when they eventually became available.

Meanwhile Intel has decided to remove MPX from x86/x64 because no one is adopting them on Intel/AMD CPUs.

EDIT: Got the ARM version wrong.