Index: llvm/lib/DebugInfo/DWARF/DWARFDebugFrame.cpp
===================================================================
--- llvm/lib/DebugInfo/DWARF/DWARFDebugFrame.cpp
+++ llvm/lib/DebugInfo/DWARF/DWARFDebugFrame.cpp
@@ -415,6 +415,10 @@
       uint8_t Version = Data.getU8(&Offset);
       const char *Augmentation = Data.getCStr(&Offset);
       StringRef AugmentationString(Augmentation ? Augmentation : "");
+      if (IsEH && Version != 1)
+        return createStringError(errc::not_supported,
+                                 "unsupported CIE version: %" PRIu8, Version);
+
       uint8_t AddressSize = Version < 4 ? Data.getAddressSize() :
                                           Data.getU8(&Offset);
       Data.setAddressSize(AddressSize);
Index: llvm/test/DebugInfo/X86/eh-frame-invalid-version-zero.s
===================================================================
--- /dev/null
+++ llvm/test/DebugInfo/X86/eh-frame-invalid-version-zero.s
@@ -0,0 +1,13 @@
+## Check we do not support .eh_frame sections of version 0.
+
+# RUN: llvm-mc -triple x86_64-unknown-linux %s -filetype=obj -o %t
+# RUN: not llvm-dwarfdump -debug-frame %t 2>&1 | FileCheck %s
+
+# CHECK: unsupported CIE version: 0
+
+.section .eh_frame,"a",@unwind
+ .long .Lend - .LCIEptr ## Length
+.LCIEptr:
+ .long 0x00000000       ## CIE ID
+ .byte 0                ## Version
+.Lend:
Index: llvm/test/DebugInfo/X86/eh-frame-invalid-version.s
===================================================================
--- /dev/null
+++ llvm/test/DebugInfo/X86/eh-frame-invalid-version.s
@@ -0,0 +1,13 @@
+## Check we do not support .eh_frame sections of versions greater than 1.
+
+# RUN: llvm-mc -triple x86_64-unknown-linux %s -filetype=obj -o %t
+# RUN: not llvm-dwarfdump -debug-frame %t 2>&1 | FileCheck %s
+
+# CHECK: unsupported CIE version: 2
+
+.section .eh_frame,"a",@unwind
+ .long .Lend - .LCIEptr ## Length
+.LCIEptr:
+ .long 0x00000000       ## CIE ID
+ .byte 2                ## Version
+.Lend: