Hi!
Is this kernel exploit fixed on the LibreELEC kernels?
Dirty COW — Critical Linux Kernel Flaw Being Exploited in the Wild
I have check the Amlogic kernel and I think that should be patched.
ARMBian kernel had already fix this issue
dirtyCOW fix for 3.14 ... all fixed. · armbian/build@13f7e3f · GitHub
Sorry but I'm not confident enough to send the PR by myself.