diff --git a/var/spack/repos/builtin/packages/intel-xed/1201-segv.patch b/var/spack/repos/builtin/packages/intel-xed/1201-segv.patch
new file mode 100644
index 0000000000..a1ff15d5c9
--- /dev/null
+++ b/var/spack/repos/builtin/packages/intel-xed/1201-segv.patch
@@ -0,0 +1,18 @@
+Fix segfault due to uninitialized data when trying to decode some cases
+of data that aren't a valid instruction.
+
+https://github.com/intelxed/xed/commit/5c54699f78ba1e3ce7e0cc6dead0088a8dd09c56
+
+
+diff --git a/src/dec/xed-decoded-init.c b/src/dec/xed-decoded-init.c
+index b0d4db1..fc226d2 100644
+--- a/src/dec/xed-decoded-init.c
++++ b/src/dec/xed-decoded-init.c
+@@ -46,6 +46,7 @@ xed_decoded_inst_zero_keep_mode_from_operands(
+     xed_operand_values_init_keep_mode(p, operands);
+     p->_decoded_length = 0;
+     p->_inst = 0;
++    p->u.user_data = 0;
+ }
+ 
+ XED_DLL_EXPORT void
diff --git a/var/spack/repos/builtin/packages/intel-xed/package.py b/var/spack/repos/builtin/packages/intel-xed/package.py
index 1e3c4f6330..06ee2791e6 100644
--- a/var/spack/repos/builtin/packages/intel-xed/package.py
+++ b/var/spack/repos/builtin/packages/intel-xed/package.py
@@ -38,6 +38,8 @@ class IntelXed(Package):
     # The current mfile uses python3 by name.
     depends_on('python@3.4:', type='build')
 
+    patch('1201-segv.patch', when='@12.0.1')
+
     conflicts('target=ppc64:', msg='intel-xed only runs on x86')
     conflicts('target=ppc64le:', msg='intel-xed only runs on x86')
     conflicts('target=aarch64:', msg='intel-xed only runs on x86')