diff --git a/pkgs/os-specific/linux/kernel/common-config.nix b/pkgs/os-specific/linux/kernel/common-config.nix
index 4b19cd2aa2a..2e64dae23fe 100644
--- a/pkgs/os-specific/linux/kernel/common-config.nix
+++ b/pkgs/os-specific/linux/kernel/common-config.nix
@@ -163,7 +163,8 @@ with stdenv.lib;
 
   # Security related features.
   STRICT_DEVMEM y # Filter access to /dev/mem
-  SECURITY_SELINUX_BOOTPARAM_VALUE 0 # disable SELinux by default
+  SECURITY_SELINUX_BOOTPARAM_VALUE 0 # Disable SELinux by default
+  DEVKMEM n # Disable /dev/kmem
 
   # Misc. options.
   8139TOO_8129 y