diff --git a/misc/config_tools/board_inspector/pcieparser/__init__.py b/misc/config_tools/board_inspector/pcieparser/__init__.py
index 1e4c30c3b..11377cfed 100644
--- a/misc/config_tools/board_inspector/pcieparser/__init__.py
+++ b/misc/config_tools/board_inspector/pcieparser/__init__.py
@@ -36,7 +36,10 @@ def parse_config_space(path):
     hdr = header(data)
     caps = capabilities(data, hdr.capability_pointer)
     config_space = PCIConfigSpace(hdr, caps, [])
-    if config_space.has_cap("PCI Express"):
+    # While PCI Express specification requires that a PCIe endpoint must have an extended capability header at offset
+    # 100h of its configuration space, we do see real PCIe endpoints not meeting this requirement occasionally. Thus,
+    # check the length of the configuration space as well before trying to parse its extended capability list.
+    if config_space.has_cap("PCI Express") and len(data) >= 260:
         extcaps = extended_capabilities(data)
         config_space = PCIConfigSpace(hdr, caps, extcaps)
     return config_space