diff --git a/ide-ahci-add-check-to-avoid-null-dereference-CVE-201.patch b/ide-ahci-add-check-to-avoid-null-dereference-CVE-201.patch
new file mode 100644
index 0000000..97824d4
--- /dev/null
+++ b/ide-ahci-add-check-to-avoid-null-dereference-CVE-201.patch
@@ -0,0 +1,40 @@
+From c7fd5f3841f14c24e442fb6968c9f2d9e016f28a Mon Sep 17 00:00:00 2001
+From: Prasad J Pandit <address@hidden>
+Date: Mon, 21 Jun 2021 09:22:35 +0800
+Subject: [PATCH] ide: ahci: add check to avoid null dereference
+ (CVE-2019-12067)
+
+Fix CVE-2019-12067
+
+AHCI emulator while committing DMA buffer in ahci_commit_buf()
+may do a NULL dereference if the command header 'ad->cur_cmd'
+is null. Add check to avoid it.
+
+Reported-by: Bugs SysSec <address@hidden>
+Signed-off-by: Prasad J Pandit <address@hidden>
+
+Signed-off-by: Jiajie Li <lijiajie11@huawei.com>
+---
+ hw/ide/ahci.c | 6 ++++--
+ 1 file changed, 4 insertions(+), 2 deletions(-)
+
+diff --git a/hw/ide/ahci.c b/hw/ide/ahci.c
+index 6aaf66534a..a7be0ae4fe 100644
+--- a/hw/ide/ahci.c
++++ b/hw/ide/ahci.c
+@@ -1455,8 +1455,10 @@ static void ahci_commit_buf(IDEDMA *dma, uint32_t tx_bytes)
+ {
+     AHCIDevice *ad = DO_UPCAST(AHCIDevice, dma, dma);
+ 
+-    tx_bytes += le32_to_cpu(ad->cur_cmd->status);
+-    ad->cur_cmd->status = cpu_to_le32(tx_bytes);
++    if (ad->cur_cmd) {
++        tx_bytes += le32_to_cpu(ad->cur_cmd->status);
++        ad->cur_cmd->status = cpu_to_le32(tx_bytes);
++    }
+ }
+ 
+ static int ahci_dma_rw_buf(IDEDMA *dma, int is_write)
+-- 
+2.27.0
+