diff --git a/0014-SecurityPkg-add-TIS-sanity-check-tpm2.patch b/0014-SecurityPkg-add-TIS-sanity-check-tpm2.patch
new file mode 100644
index 0000000..a08011a
--- /dev/null
+++ b/0014-SecurityPkg-add-TIS-sanity-check-tpm2.patch
@@ -0,0 +1,35 @@
+From cb0ffbcd86756a47696b6e24e19552d2bcc4238a Mon Sep 17 00:00:00 2001
+From: Gerd Hoffmann <kraxel@redhat.com>
+Date: Wed, 26 Apr 2023 14:37:13 +0200
+Subject: [PATCH 14/16] SecurityPkg: add TIS sanity check (tpm2)
+
+The code blindly assumes a TIS interface is present in case both CRB and
+FIFO checks fail.  Check the InterfaceType for TIS instead and only
+return Tpm2PtpInterfaceTis in case it matches, Tpm2PtpInterfaceMax
+otherwise.
+
+Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
+---
+ SecurityPkg/Library/Tpm2DeviceLibDTpm/Tpm2Ptp.c | 6 +++++-
+ 1 file changed, 5 insertions(+), 1 deletion(-)
+
+diff --git a/SecurityPkg/Library/Tpm2DeviceLibDTpm/Tpm2Ptp.c b/SecurityPkg/Library/Tpm2DeviceLibDTpm/Tpm2Ptp.c
+index 1f9ac5ab5a30..eac9f0e29941 100644
+--- a/SecurityPkg/Library/Tpm2DeviceLibDTpm/Tpm2Ptp.c
++++ b/SecurityPkg/Library/Tpm2DeviceLibDTpm/Tpm2Ptp.c
+@@ -464,7 +464,11 @@ Tpm2GetPtpInterface (
+     return Tpm2PtpInterfaceFifo;
+   }
+ 
+-  return Tpm2PtpInterfaceTis;
++  if (InterfaceId.Bits.InterfaceType == PTP_INTERFACE_IDENTIFIER_INTERFACE_TYPE_TIS) {
++    return Tpm2PtpInterfaceTis;
++  }
++
++  return Tpm2PtpInterfaceMax;
+ }
+ 
+ /**
+-- 
+2.40.0
+
diff --git a/0015-SecurityPkg-add-TIS-sanity-check-tpm12.patch b/0015-SecurityPkg-add-TIS-sanity-check-tpm12.patch
new file mode 100644
index 0000000..2030b7d
--- /dev/null
+++ b/0015-SecurityPkg-add-TIS-sanity-check-tpm12.patch
@@ -0,0 +1,34 @@
+From 54ae30cea7731b9949b7e503401f732f1e95e930 Mon Sep 17 00:00:00 2001
+From: Gerd Hoffmann <kraxel@redhat.com>
+Date: Wed, 26 Apr 2023 14:38:34 +0200
+Subject: [PATCH 15/16] SecurityPkg: add TIS sanity check (tpm12)
+
+The code blindly assumes a TIS interface is present in case both CRB and
+FIFO checks fail.  Check the InterfaceType for TIS instead and only
+return PtpInterfaceTis in case it matches, PtpInterfaceMax otherwise.
+
+Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
+---
+ SecurityPkg/Library/Tpm12DeviceLibDTpm/Tpm12Tis.c | 6 +++++-
+ 1 file changed, 5 insertions(+), 1 deletion(-)
+
+diff --git a/SecurityPkg/Library/Tpm12DeviceLibDTpm/Tpm12Tis.c b/SecurityPkg/Library/Tpm12DeviceLibDTpm/Tpm12Tis.c
+index 51f43591287a..d2b79a274084 100644
+--- a/SecurityPkg/Library/Tpm12DeviceLibDTpm/Tpm12Tis.c
++++ b/SecurityPkg/Library/Tpm12DeviceLibDTpm/Tpm12Tis.c
+@@ -91,7 +91,11 @@ Tpm12GetPtpInterface (
+     return PtpInterfaceFifo;
+   }
+ 
+-  return PtpInterfaceTis;
++  if (InterfaceId.Bits.InterfaceType == PTP_INTERFACE_IDENTIFIER_INTERFACE_TYPE_TIS) {
++    return PtpInterfaceTis;
++  }
++
++  return PtpInterfaceMax;
+ }
+ 
+ /**
+-- 
+2.40.0
+
diff --git a/edk2.spec b/edk2.spec
index 7d1277b..e0b5de4 100644
--- a/edk2.spec
+++ b/edk2.spec
@@ -96,6 +96,8 @@ Patch0010: 0010-OvmfPkg-silence-EFI_D_VERBOSE-0x00400000-in-NvmExpre.patch
 Patch0011: 0011-CryptoPkg-OpensslLib-list-RHEL8-specific-OpenSSL-fil.patch
 Patch0012: 0012-OvmfPkg-QemuKernelLoaderFsDxe-suppress-error-on-no-k.patch
 Patch0013: 0013-SecurityPkg-Tcg2Dxe-suppress-error-on-no-swtpm-in-si.patch
+Patch0014: 0014-SecurityPkg-add-TIS-sanity-check-tpm2.patch
+Patch0015: 0015-SecurityPkg-add-TIS-sanity-check-tpm12.patch
 
 
 # python3-devel and libuuid-devel are required for building tools.