diff --git a/meta/classes-recipe/populate_sdk_base.bbclass b/meta/classes-recipe/populate_sdk_base.bbclass
index 8d79d88ebe..61a8b5e300 100644
--- a/meta/classes-recipe/populate_sdk_base.bbclass
+++ b/meta/classes-recipe/populate_sdk_base.bbclass
@@ -6,6 +6,10 @@
 
 PACKAGES = ""
 
+# This exists as an optimization for SPDX processing to only run in image and
+# SDK processing context.  This class happens to be common to these usages.
+SPDX_MULTILIB_SSTATE_ARCHS = "${@all_multilib_tune_values(d, 'SSTATE_ARCHS')}"
+
 inherit image-postinst-intercepts image-artifact-names
 
 # Wildcards specifying complementary packages to install for every package that has been explicitly
diff --git a/meta/classes/create-spdx-2.2.bbclass b/meta/classes/create-spdx-2.2.bbclass
index 12b78cb3f6..509d3b58b6 100644
--- a/meta/classes/create-spdx-2.2.bbclass
+++ b/meta/classes/create-spdx-2.2.bbclass
@@ -267,7 +267,7 @@ def collect_dep_recipes(d, doc, spdx_recipe):
     import oe.spdx_common
 
     deploy_dir_spdx = Path(d.getVar("DEPLOY_DIR_SPDX"))
-    package_archs = d.getVar("SSTATE_ARCHS").split()
+    package_archs = d.getVar("SPDX_MULTILIB_SSTATE_ARCHS").split()
     package_archs.reverse()
 
     dep_recipes = []
@@ -312,7 +312,7 @@ def collect_dep_recipes(d, doc, spdx_recipe):
 
     return dep_recipes
 
-collect_dep_recipes[vardepsexclude] = "SSTATE_ARCHS"
+collect_dep_recipes[vardepsexclude] = "SPDX_MULTILIB_SSTATE_ARCHS"
 
 def collect_dep_sources(d, dep_recipes):
     import oe.sbom
@@ -610,7 +610,7 @@ python do_create_runtime_spdx() {
 
     providers = oe.spdx_common.collect_package_providers(d)
     pkg_arch = d.getVar("SSTATE_PKGARCH")
-    package_archs = d.getVar("SSTATE_ARCHS").split()
+    package_archs = d.getVar("SPDX_MULTILIB_SSTATE_ARCHS").split()
     package_archs.reverse()
 
     if not is_native:
@@ -716,7 +716,7 @@ python do_create_runtime_spdx() {
             oe.sbom.write_doc(d, runtime_doc, pkg_arch, "runtime", spdx_deploy, indent=get_json_indent(d))
 }
 
-do_create_runtime_spdx[vardepsexclude] += "OVERRIDES SSTATE_ARCHS"
+do_create_runtime_spdx[vardepsexclude] += "OVERRIDES SPDX_MULTILIB_SSTATE_ARCHS"
 
 addtask do_create_runtime_spdx after do_create_spdx before do_build do_rm_work
 SSTATETASKS += "do_create_runtime_spdx"
@@ -798,7 +798,7 @@ def combine_spdx(d, rootfs_name, rootfs_deploydir, rootfs_spdxid, packages, spdx
     import bb.compress.zstd
 
     providers = oe.spdx_common.collect_package_providers(d)
-    package_archs = d.getVar("SSTATE_ARCHS").split()
+    package_archs = d.getVar("SPDX_MULTILIB_SSTATE_ARCHS").split()
     package_archs.reverse()
 
     creation_time = datetime.now(tz=timezone.utc).strftime("%Y-%m-%dT%H:%M:%SZ")
@@ -950,4 +950,4 @@ def combine_spdx(d, rootfs_name, rootfs_deploydir, rootfs_spdxid, packages, spdx
 
             tar.addfile(info, fileobj=index_str)
 
-combine_spdx[vardepsexclude] += "BB_NUMBER_THREADS SSTATE_ARCHS"
+combine_spdx[vardepsexclude] += "BB_NUMBER_THREADS SPDX_MULTILIB_SSTATE_ARCHS"
diff --git a/meta/classes/create-spdx-3.0.bbclass b/meta/classes/create-spdx-3.0.bbclass
index 41840d9d1a..2eb44ba808 100644
--- a/meta/classes/create-spdx-3.0.bbclass
+++ b/meta/classes/create-spdx-3.0.bbclass
@@ -118,7 +118,7 @@ IMAGE_CLASSES:append = " create-spdx-image-3.0"
 
 oe.spdx30_tasks.set_timestamp_now[vardepsexclude] = "SPDX_INCLUDE_TIMESTAMPS"
 oe.spdx30_tasks.get_package_sources_from_debug[vardepsexclude] += "STAGING_KERNEL_DIR"
-oe.spdx30_tasks.collect_dep_objsets[vardepsexclude] = "SSTATE_ARCHS"
+oe.spdx30_tasks.collect_dep_objsets[vardepsexclude] = "SPDX_MULTILIB_SSTATE_ARCHS"
 
 
 
@@ -164,7 +164,7 @@ python do_create_package_spdx() {
     import oe.spdx30_tasks
     oe.spdx30_tasks.create_package_spdx(d)
 }
-do_create_package_spdx[vardepsexclude] += "OVERRIDES SSTATE_ARCHS"
+do_create_package_spdx[vardepsexclude] += "OVERRIDES SPDX_MULTILIB_SSTATE_ARCHS"
 
 addtask do_create_package_spdx after do_create_spdx before do_build do_rm_work
 SSTATETASKS += "do_create_package_spdx"
diff --git a/meta/classes/spdx-common.bbclass b/meta/classes/spdx-common.bbclass
index d3110a9bdb..e1528b6d0b 100644
--- a/meta/classes/spdx-common.bbclass
+++ b/meta/classes/spdx-common.bbclass
@@ -37,6 +37,8 @@ SPDX_LICENSES ??= "${COREBASE}/meta/files/spdx-licenses.json"
 
 SPDX_CUSTOM_ANNOTATION_VARS ??= ""
 
+SPDX_MULTILIB_SSTATE_ARCHS ??= "${SSTATE_ARCHS}"
+
 python() {
     import oe.spdx_common
     oe.spdx_common.load_spdx_license_data(d)
diff --git a/meta/lib/oe/sbom30.py b/meta/lib/oe/sbom30.py
index 2532d19dad..27ed74f810 100644
--- a/meta/lib/oe/sbom30.py
+++ b/meta/lib/oe/sbom30.py
@@ -921,7 +921,7 @@ def load_jsonld_by_arch(d, arch, subdir, name, *, required=False):
 
 
 def find_jsonld(d, subdir, name, *, required=False):
-    package_archs = d.getVar("SSTATE_ARCHS").split()
+    package_archs = d.getVar("SPDX_MULTILIB_SSTATE_ARCHS").split()
     package_archs.reverse()
 
     for arch in package_archs: