diff --git a/hw-sd-sdhci-Don-t-write-to-SDHC_SYSAD-register-when-.patch b/hw-sd-sdhci-Don-t-write-to-SDHC_SYSAD-register-when-.patch
new file mode 100644
index 0000000..7460614
--- /dev/null
+++ b/hw-sd-sdhci-Don-t-write-to-SDHC_SYSAD-register-when-.patch
@@ -0,0 +1,106 @@
+From f95d0c3bb20d33cfef35378fbfbd61b02544b2d4 Mon Sep 17 00:00:00 2001
+From: Bin Meng <bmeng.cn@gmail.com>
+Date: Sat, 8 May 2021 10:47:12 +0800
+Subject: [PATCH] hw/sd: sdhci: Don't write to SDHC_SYSAD register when
+ transfer is in progress
+
+Fixes: CVE-2020-17380
+Fixes: CVE-2020-25085
+Fixes: CVE-2021-3409
+
+Per "SD Host Controller Standard Specification Version 7.00"
+chapter 2.2.1 SDMA System Address Register:
+
+This register can be accessed only if no transaction is executing
+(i.e., after a transaction has stopped).
+
+With this fix, the following reproducer:
+
+outl 0xcf8 0x80001010
+outl 0xcfc 0xfbefff00
+outl 0xcf8 0x80001001
+outl 0xcfc 0x06000000
+write 0xfbefff2c 0x1 0x05
+write 0xfbefff0f 0x1 0x37
+write 0xfbefff0a 0x1 0x01
+write 0xfbefff0f 0x1 0x29
+write 0xfbefff0f 0x1 0x02
+write 0xfbefff0f 0x1 0x03
+write 0xfbefff04 0x1 0x01
+write 0xfbefff05 0x1 0x01
+write 0xfbefff07 0x1 0x02
+write 0xfbefff0c 0x1 0x33
+write 0xfbefff0e 0x1 0x20
+write 0xfbefff0f 0x1 0x00
+write 0xfbefff2a 0x1 0x01
+write 0xfbefff0c 0x1 0x00
+write 0xfbefff03 0x1 0x00
+write 0xfbefff05 0x1 0x00
+write 0xfbefff2a 0x1 0x02
+write 0xfbefff0c 0x1 0x32
+write 0xfbefff01 0x1 0x01
+write 0xfbefff02 0x1 0x01
+write 0xfbefff03 0x1 0x01
+
+cannot be reproduced with the following QEMU command line:
+
+$ qemu-system-x86_64 -nographic -machine accel=qtest -m 512M \
+       -nodefaults -device sdhci-pci,sd-spec-version=3 \
+       -drive if=sd,index=0,file=null-co://,format=raw,id=mydrive \
+       -device sd-card,drive=mydrive -qtest stdio
+
+Cc: qemu-stable@nongnu.org
+Fixes: CVE-2020-17380
+Fixes: CVE-2020-25085
+Fixes: CVE-2021-3409
+Fixes: d7dfca0807a0 ("hw/sdhci: introduce standard SD host controller")
+Reported-by: Alexander Bulekov <alxndr@bu.edu>
+Reported-by: Cornelius Aschermann (Ruhr-University Bochum)
+Reported-by: Muhammad Ramdhan
+Reported-by: Sergej Schumilo (Ruhr-University Bochum)
+Reported-by: Simon Wrner (Ruhr-University Bochum)
+Buglink: https://bugs.launchpad.net/qemu/+bug/1892960
+Buglink: https://bugs.launchpad.net/qemu/+bug/1909418
+Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1928146
+Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
+Tested-by: Alexander Bulekov <alxndr@bu.edu>
+
+Signed-off-by: Jiajie Li <lijiajie11@huawei.com>
+---
+ hw/sd/sdhci.c | 20 +++++++++++---------
+ 1 file changed, 11 insertions(+), 9 deletions(-)
+
+diff --git a/hw/sd/sdhci.c b/hw/sd/sdhci.c
+index 419782c25d..fdb59f44e6 100644
+--- a/hw/sd/sdhci.c
++++ b/hw/sd/sdhci.c
+@@ -1117,15 +1117,17 @@ sdhci_write(void *opaque, hwaddr offset, uint64_t val, unsigned size)
+ 
+     switch (offset & ~0x3) {
+     case SDHC_SYSAD:
+-        s->sdmasysad = (s->sdmasysad & mask) | value;
+-        MASKED_WRITE(s->sdmasysad, mask, value);
+-        /* Writing to last byte of sdmasysad might trigger transfer */
+-        if (!(mask & 0xFF000000) && TRANSFERRING_DATA(s->prnsts) && s->blkcnt &&
+-                s->blksize && SDHC_DMA_TYPE(s->hostctl1) == SDHC_CTRL_SDMA) {
+-            if (s->trnmod & SDHC_TRNS_MULTI) {
+-                sdhci_sdma_transfer_multi_blocks(s);
+-            } else {
+-                sdhci_sdma_transfer_single_block(s);
++        if (!TRANSFERRING_DATA(s->prnsts)) {
++            s->sdmasysad = (s->sdmasysad & mask) | value;
++            MASKED_WRITE(s->sdmasysad, mask, value);
++            /* Writing to last byte of sdmasysad might trigger transfer */
++            if (!(mask & 0xFF000000) && s->blkcnt && s->blksize &&
++                SDHC_DMA_TYPE(s->hostctl1) == SDHC_CTRL_SDMA) {
++                if (s->trnmod & SDHC_TRNS_MULTI) {
++                    sdhci_sdma_transfer_multi_blocks(s);
++                } else {
++                    sdhci_sdma_transfer_single_block(s);
++                }
+             }
+         }
+         break;
+-- 
+2.27.0
+