diff --git a/dyninst-11.0.0-nullbuf.patch b/dyninst-11.0.0-nullbuf.patch
new file mode 100644
index 0000000..9f7e1de
--- /dev/null
+++ b/dyninst-11.0.0-nullbuf.patch
@@ -0,0 +1,25 @@
+rhbz1991997
+
+commit 212576147 (refs/bisect/new)
+Author: Xiaozhu Meng <mxz297@gmail.com>
+Date:   Wed May 26 11:26:28 2021 -0500
+
+    Skip parsing of blocks whose code buffer is null (#1033)
+
+--- dyninst-11.0.0/parseAPI/src/Parser.C.orig
++++ dyninst-11.0.0/parseAPI/src/Parser.C
+@@ -1703,6 +1703,14 @@ Parser::parse_frame_one_iteration(ParseFrame &frame, bool recursive) {
+             cur->region()->offset() + cur->region()->length() - curAddr;
+         const unsigned char* bufferBegin =
+             (const unsigned char *)(func->region()->getPtrToInstruction(curAddr));
++        if (bufferBegin == nullptr) {
++            // This can happen if jump table is over-approxiated.
++            // We ignore this block for now, and later the over-approximated block
++            // will be removed.
++            parsing_printf("\taddress %lx in a different region from the funcion entry at %lx, skip parsing\n", curAddr, func->addr());
++            continue;
++        }
++
+         InstructionDecoder dec(bufferBegin,size,frame.codereg->getArch());
+ 
+         if (!ahPtr)
diff --git a/dyninst.spec b/dyninst.spec
index ad3456c..74e855f 100644
--- a/dyninst.spec
+++ b/dyninst.spec
@@ -1,7 +1,7 @@
 Summary: An API for Run-time Code Generation
 License: LGPLv2+
 Name: dyninst
-Release: 3%{?dist}
+Release: 4%{?dist}
 URL: http://www.dyninst.org
 Version: 11.0.0
 ExclusiveArch: %{ix86} x86_64 ppc64le aarch64
@@ -13,6 +13,7 @@ Patch1: testsuite-11.0.0-test12.patch
 Patch2: testsuite-11.0.0-386.patch
 Patch3: dyninst-11.0.0-dwarf.patch
 Patch4: dyninst-11.0.0-rosebc.patch
+Patch5: dyninst-11.0.0-nullbuf.patch
 
 %global dyninst_base dyninst-%{version}
 %global testsuite_base testsuite-%{version}
@@ -85,6 +86,7 @@ popd
 pushd %{dyninst_base}
 %patch3 -p1 -b .dwarf
 %patch4 -p1 -b .rosebc
+%patch5 -p1 -b .nullbuf
 popd
 
 # cotire seems to cause non-deterministic gcc errors
@@ -189,6 +191,9 @@ find %{buildroot}%{_libdir}/dyninst/testsuite/ \
 %attr(644,root,root) %{_libdir}/dyninst/testsuite/*.a
 
 %changelog
+* Tue Aug 10 2021 Stan Cox <scox@redhat.com> - 11.0.0-4
+- Related: rhbz1991997
+
 * Mon Aug 09 2021 Mohan Boddu <mboddu@redhat.com> - 11.0.0-3
 - Rebuilt for IMA sigs, glibc 2.34, aarch64 flags
   Related: rhbz#1991688