diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 0cf74a6..fe9a9cf 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -3227,6 +3227,14 @@
 		if (!is_paging(vcpu)) {
 			hw_cr4 &= ~X86_CR4_PAE;
 			hw_cr4 |= X86_CR4_PSE;
+			/*
+			 * SMEP is disabled if CPU is in non-paging mode in
+			 * hardware. However KVM always uses paging mode to
+			 * emulate guest non-paging mode with TDP.
+			 * To emulate this behavior, SMEP needs to be manually
+			 * disabled when guest switches to non-paging mode.
+			 */
+			hw_cr4 &= ~X86_CR4_SMEP;
 		} else if (!(cr4 & X86_CR4_PAE)) {
 			hw_cr4 &= ~X86_CR4_PAE;
 		}