diff --git a/include/spdk/nvme.h b/include/spdk/nvme.h
index 6b184cebf..dad9333b6 100644
--- a/include/spdk/nvme.h
+++ b/include/spdk/nvme.h
@@ -615,6 +615,15 @@ union spdk_nvme_cap_register spdk_nvme_ctrlr_get_regs_cap(struct spdk_nvme_ctrlr
  */
 union spdk_nvme_vs_register spdk_nvme_ctrlr_get_regs_vs(struct spdk_nvme_ctrlr *ctrlr);
 
+/**
+ * Get the NVMe controller CMBSZ (Controller Memory Buffer Size) register
+ *
+ * \param ctrlr Opaque handle to NVMe controller.
+ *
+ * \return the NVMe controller CMBSZ (Controller Memory Buffer Size) register.
+ */
+union spdk_nvme_cmbsz_register spdk_nvme_ctrlr_get_regs_cmbsz(struct spdk_nvme_ctrlr *ctrlr);
+
 /**
  * Get the number of namespaces for the given NVMe controller.
  *
diff --git a/lib/nvme/nvme_ctrlr.c b/lib/nvme/nvme_ctrlr.c
index b9e73ad11..280fe1e66 100644
--- a/lib/nvme/nvme_ctrlr.c
+++ b/lib/nvme/nvme_ctrlr.c
@@ -78,6 +78,13 @@ nvme_ctrlr_set_cc(struct spdk_nvme_ctrlr *ctrlr, const union spdk_nvme_cc_regist
 					      cc->raw);
 }
 
+int
+nvme_ctrlr_get_cmbsz(struct spdk_nvme_ctrlr *ctrlr, union spdk_nvme_cmbsz_register *cmbsz)
+{
+	return nvme_transport_ctrlr_get_reg_4(ctrlr, offsetof(struct spdk_nvme_registers, cmbsz.raw),
+					      &cmbsz->raw);
+}
+
 void
 spdk_nvme_ctrlr_get_default_ctrlr_opts(struct spdk_nvme_ctrlr_opts *opts, size_t opts_size)
 {
@@ -2354,6 +2361,17 @@ union spdk_nvme_vs_register spdk_nvme_ctrlr_get_regs_vs(struct spdk_nvme_ctrlr *
 	return ctrlr->vs;
 }
 
+union spdk_nvme_cmbsz_register spdk_nvme_ctrlr_get_regs_cmbsz(struct spdk_nvme_ctrlr *ctrlr)
+{
+	union spdk_nvme_cmbsz_register cmbsz;
+
+	if (nvme_ctrlr_get_cmbsz(ctrlr, &cmbsz)) {
+		cmbsz.raw = 0;
+	}
+
+	return cmbsz;
+}
+
 uint32_t
 spdk_nvme_ctrlr_get_num_ns(struct spdk_nvme_ctrlr *ctrlr)
 {
diff --git a/lib/nvme/nvme_internal.h b/lib/nvme/nvme_internal.h
index 785152fb0..a90e219c1 100644
--- a/lib/nvme/nvme_internal.h
+++ b/lib/nvme/nvme_internal.h
@@ -816,6 +816,7 @@ int	nvme_ctrlr_submit_admin_request(struct spdk_nvme_ctrlr *ctrlr,
 					struct nvme_request *req);
 int	nvme_ctrlr_get_cap(struct spdk_nvme_ctrlr *ctrlr, union spdk_nvme_cap_register *cap);
 int	nvme_ctrlr_get_vs(struct spdk_nvme_ctrlr *ctrlr, union spdk_nvme_vs_register *vs);
+int	nvme_ctrlr_get_cmbsz(struct spdk_nvme_ctrlr *ctrlr, union spdk_nvme_cmbsz_register *cmbsz);
 void	nvme_ctrlr_init_cap(struct spdk_nvme_ctrlr *ctrlr, const union spdk_nvme_cap_register *cap,
 			    const union spdk_nvme_vs_register *vs);
 int	nvme_qpair_init(struct spdk_nvme_qpair *qpair, uint16_t id,