diff --git a/debian/changelog b/debian/changelog
index 7db79bcda..2af0bb6af 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -29,6 +29,9 @@ linux (4.19.6-1~exp1) UNRELEASED; urgency=medium
   * debian/rules: Mark more targets as phony
   * libcpupower: Hide private function and drop it from .symbols file
 
+  [ Salvatore Bonaccorso ]
+  * [x86] KVM: LAPIC: Fix pv ipis use-before-initialization (CVE-2018-19406)
+
  -- Uwe Kleine-König <ukleinek@debian.org>  Wed, 28 Nov 2018 12:20:46 +0100
 
 linux (4.19.5-1~exp1) experimental; urgency=medium
diff --git a/debian/patches/bugfix/x86/KVM-LAPIC-Fix-pv-ipis-use-before-initialization.patch b/debian/patches/bugfix/x86/KVM-LAPIC-Fix-pv-ipis-use-before-initialization.patch
new file mode 100644
index 000000000..a461a1537
--- /dev/null
+++ b/debian/patches/bugfix/x86/KVM-LAPIC-Fix-pv-ipis-use-before-initialization.patch
@@ -0,0 +1,65 @@
+From: Wanpeng Li <kernellwp@gmail.com>
+Date: Tue, 20 Nov 2018 09:39:30 +0800
+Subject: KVM: LAPIC: Fix pv ipis use-before-initialization
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+Origin: https://git.kernel.org/linus/38ab012f109caf10f471db1adf284e620dd8d701
+Bug-Debian-Security: https://security-tracker.debian.org/tracker/CVE-2018-19406
+
+Reported by syzkaller:
+
+ BUG: unable to handle kernel NULL pointer dereference at 0000000000000014
+ PGD 800000040410c067 P4D 800000040410c067 PUD 40410d067 PMD 0
+ Oops: 0000 [#1] PREEMPT SMP PTI
+ CPU: 3 PID: 2567 Comm: poc Tainted: G           OE     4.19.0-rc5 #16
+ RIP: 0010:kvm_pv_send_ipi+0x94/0x350 [kvm]
+ Call Trace:
+  kvm_emulate_hypercall+0x3cc/0x700 [kvm]
+  handle_vmcall+0xe/0x10 [kvm_intel]
+  vmx_handle_exit+0xc1/0x11b0 [kvm_intel]
+  vcpu_enter_guest+0x9fb/0x1910 [kvm]
+  kvm_arch_vcpu_ioctl_run+0x35c/0x610 [kvm]
+  kvm_vcpu_ioctl+0x3e9/0x6d0 [kvm]
+  do_vfs_ioctl+0xa5/0x690
+  ksys_ioctl+0x6d/0x80
+  __x64_sys_ioctl+0x1a/0x20
+  do_syscall_64+0x83/0x6e0
+  entry_SYSCALL_64_after_hwframe+0x49/0xbe
+
+The reason is that the apic map has not yet been initialized, the testcase
+triggers pv_send_ipi interface by vmcall which results in kvm->arch.apic_map
+is dereferenced. This patch fixes it by checking whether or not apic map is
+NULL and bailing out immediately if that is the case.
+
+Fixes: 4180bf1b65 (KVM: X86: Implement "send IPI" hypercall)
+Reported-by: Wei Wu <ww9210@gmail.com>
+Cc: Paolo Bonzini <pbonzini@redhat.com>
+Cc: Radim Krčmář <rkrcmar@redhat.com>
+Cc: Wei Wu <ww9210@gmail.com>
+Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
+Cc: stable@vger.kernel.org
+Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
+---
+ arch/x86/kvm/lapic.c | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
+index 89db20f8cb70..02f2291dcf7e 100644
+--- a/arch/x86/kvm/lapic.c
++++ b/arch/x86/kvm/lapic.c
+@@ -576,6 +576,11 @@ int kvm_pv_send_ipi(struct kvm *kvm, unsigned long ipi_bitmap_low,
+ 	rcu_read_lock();
+ 	map = rcu_dereference(kvm->arch.apic_map);
+ 
++	if (unlikely(!map)) {
++		count = -EOPNOTSUPP;
++		goto out;
++	}
++
+ 	if (min > map->max_apic_id)
+ 		goto out;
+ 	/* Bits above cluster_size are masked in the caller.  */
+-- 
+2.11.0
+
diff --git a/debian/patches/series b/debian/patches/series
index b5191ac9b..e7437c770 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -130,6 +130,7 @@ features/all/lockdown/arm64-add-kernel-config-option-to-lock-down-when.patch
 
 # Security fixes
 debian/i386-686-pae-pci-set-pci-nobios-by-default.patch
+bugfix/x86/KVM-LAPIC-Fix-pv-ipis-use-before-initialization.patch
 
 # Fix exported symbol versions
 bugfix/all/module-disable-matching-missing-version-crc.patch