[Question] Backporting ACPI fix to Buster kernel?

[Laurențiu Păncescu <lpancescu@gmail.com>]

Hello Debian Kernel Team,

I discovered an older Asus netbook always reports its battery as 100% 
charged even after being unplugged for several hours and with its CPU 
intentionally maxed out. This seems to be upstream bug #199981 in 
kernels 4.17-4.20 and affected Asus-made laptops (I see the same 
behavior with and without acpi_osi=Linux). [1]

Is there any chance of backporting the fix to Buster? Should I file a 
bug about that?

If not, do the kernels on backports get quick security updates, 
comparable with kernels in stable? Even now, during hard and soon full 
freeze?

Thanks,
Laurentiu

[1] https://bugzilla.kernel.org/show_bug.cgi?id=199981