Are there any ROMS that have a kernel that supports mount namespace?

[Causener]

I have a few apps that won't function on my phone because they can detect the root, but Magisk is unable to hide the root because my kernel does not support mount namespace. Are there any custom ROMs/kernel that have this functionality backported or is the phone simply too old?

From Magisk:

Mount namespace issues
If you see this line in the Magisk log/magisk_debug.log (see "Asking for help/reporting bugs"): "proc_monitor: Your kernel doesn't support mount namespace", your device has a Linux kernel that is to old. The Linux kernel version have to be at least 3.8 (thank you TheCech12), or otherwise have the necessary features backported. Ask in your ROM/kernel thread or try a different ROM and/or kernel.

 

[tom.etc]

if you are using a marshmallow rom there's this kernel. i use it, magisk works, and safetynet tests clean