diff --git a/vboxdrv/r0drv/linux/mp-r0drv-linux.c b/vboxdrv/r0drv/linux/mp-r0drv-linux.c
index ee219b7..eff4f2c 100644
--- a/vboxdrv/r0drv/linux/mp-r0drv-linux.c
+++ b/vboxdrv/r0drv/linux/mp-r0drv-linux.c
@@ -283,12 +283,15 @@ RTDECL(int) RTMpOnAll(PFNRTMPWORKER pfnWorker, void *pvUser1, void *pvUser2)
     if (RTCpuSetCount(&OnlineSet) > 1)
     {
         /* Fire the function on all other CPUs without waiting for completion. */
-# if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 27)
+# if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 3, 0)
+	NOREF(smp_call_function(rtmpLinuxAllWrapper, &Args, 0 /* wait */));
+# elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 27)
         int rc = smp_call_function(rtmpLinuxAllWrapper, &Args, 0 /* wait */);
+        Assert(!rc); NOREF(rc);
 # else
         int rc = smp_call_function(rtmpLinuxAllWrapper, &Args, 0 /* retry */, 0 /* wait */);
-# endif
         Assert(!rc); NOREF(rc);
+# endif
     }
 #endif
 
@@ -337,14 +340,19 @@ RTDECL(int) RTMpOnOthers(PFNRTMPWORKER pfnWorker, void *pvUser1, void *pvUser2)
     Args.cHits = 0;
 
     RTThreadPreemptDisable(&PreemptState);
-# if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 27)
+# if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 3, 0)
+    NOREF(smp_call_function(rtmpLinuxWrapper, &Args, 1 /* wait */));
+# elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 27) /* older kernels */
     rc = smp_call_function(rtmpLinuxWrapper, &Args, 1 /* wait */);
-# else /* older kernels */
+# else
     rc = smp_call_function(rtmpLinuxWrapper, &Args, 0 /* retry */, 1 /* wait */);
 # endif /* older kernels */
     RTThreadPreemptRestore(&PreemptState);
 
+# if LINUX_VERSION_CODE < KERNEL_VERSION(5, 3, 0)
     Assert(rc == 0); NOREF(rc);
+# endif
+
     IPRT_LINUX_RESTORE_EFL_AC();
 #else
     RT_NOREF(pfnWorker, pvUser1, pvUser2);
diff --git a/vboxnetflt/linux/VBoxNetFlt-linux.c b/vboxnetflt/linux/VBoxNetFlt-linux.c
index 0068f04..93845d0 100644
--- a/vboxnetflt/linux/VBoxNetFlt-linux.c
+++ b/vboxnetflt/linux/VBoxNetFlt-linux.c
@@ -2107,6 +2107,10 @@ static int vboxNetFltLinuxEnumeratorCallback(struct notifier_block *self, unsign
     struct in_device *in_dev;
     struct inet6_dev *in6_dev;
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 3, 0)
+    const struct in_ifaddr *ifa;
+#endif
+
     if (ulEventType != NETDEV_REGISTER)
         return NOTIFY_OK;
 
@@ -2123,7 +2127,12 @@ static int vboxNetFltLinuxEnumeratorCallback(struct notifier_block *self, unsign
 #endif
     if (in_dev != NULL)
     {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 3, 0)
+        rcu_read_lock();
+        in_dev_for_each_ifa_rcu(ifa, in_dev) {
+#else
         for_ifa(in_dev) {
+#endif
             if (VBOX_IPV4_IS_LOOPBACK(ifa->ifa_address))
                 return NOTIFY_OK;
 
@@ -2137,7 +2146,11 @@ static int vboxNetFltLinuxEnumeratorCallback(struct notifier_block *self, unsign
 
             pThis->pSwitchPort->pfnNotifyHostAddress(pThis->pSwitchPort,
                 /* :fAdded */ true, kIntNetAddrType_IPv4, &ifa->ifa_address);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 3, 0)
+	} rcu_read_unlock();
+#else
         } endfor_ifa(in_dev);
+#endif
     }
 
     /*