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Index: p7zip_15.14.1/CPP/7zip/Archive/Udf/UdfIn.cpp
===================================================================
--- p7zip_15.14.1.orig/CPP/7zip/Archive/Udf/UdfIn.cpp
+++ p7zip_15.14.1/CPP/7zip/Archive/Udf/UdfIn.cpp
@@ -389,7 +389,11 @@ HRESULT CInArchive::ReadFileItem(int vol
return S_FALSE;
CFile &file = Files.Back();
const CLogVol &vol = LogVols[volIndex];
- CPartition &partition = Partitions[vol.PartitionMaps[lad.Location.PartitionRef].PartitionIndex];
+ unsigned partitionRef = lad.Location.PartitionRef;
+
+ if (partitionRef >= vol.PartitionMaps.Size())
+ return S_FALSE;
+ CPartition &partition = Partitions[vol.PartitionMaps[partitionRef].PartitionIndex];
UInt32 key = lad.Location.Pos;
UInt32 value;
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