diff --git a/sys/kern/kern_proc.c b/sys/kern/kern_proc.c
--- a/sys/kern/kern_proc.c
+++ b/sys/kern/kern_proc.c
@@ -2678,6 +2678,12 @@
 			kve->kve_protection |= KVME_PROT_WRITE;
 		if (entry->protection & VM_PROT_EXECUTE)
 			kve->kve_protection |= KVME_PROT_EXEC;
+		if (entry->max_protection & VM_PROT_READ)
+			kve->kve_protection |= KVME_MAX_PROT_READ;
+		if (entry->max_protection & VM_PROT_WRITE)
+			kve->kve_protection |= KVME_MAX_PROT_WRITE;
+		if (entry->max_protection & VM_PROT_EXECUTE)
+			kve->kve_protection |= KVME_MAX_PROT_EXEC;
 
 		if (entry->eflags & MAP_ENTRY_COW)
 			kve->kve_flags |= KVME_FLAG_COW;
diff --git a/sys/sys/user.h b/sys/sys/user.h
--- a/sys/sys/user.h
+++ b/sys/sys/user.h
@@ -506,6 +506,9 @@
 #define	KVME_PROT_READ		0x00000001
 #define	KVME_PROT_WRITE		0x00000002
 #define	KVME_PROT_EXEC		0x00000004
+#define	KVME_MAX_PROT_READ	0x00010000
+#define	KVME_MAX_PROT_WRITE	0x00020000
+#define	KVME_MAX_PROT_EXEC	0x00040000
 
 #define	KVME_FLAG_COW		0x00000001
 #define	KVME_FLAG_NEEDS_COPY	0x00000002