diff --git a/HISTORY.md b/HISTORY.md
index 45cf403ad..ff55ebd43 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -14,6 +14,7 @@
 * Fix L0 file misorder corruption caused by ingesting files of overlapping seqnos with memtable entries' through introducing `epoch_number`. Before the fix, `force_consistency_checks=true` may catch the corruption before it's exposed to readers, in which case writes returning `Status::Corruption` would be expected. Also replace the previous incomplete fix (#5958) to the same corruption with this new and more complete fix.
 * Fixed a bug in LockWAL() leading to re-locking mutex (#11020).
 * Fixed a heap use after free bug in async scan prefetching when the scan thread and another thread try to read and load the same seek block into cache.
+* Fixed a heap use after free in async scan prefetching if dictionary compression is enabled, in which case sync read of the compression dictionary gets mixed with async prefetching
 
 ### New Features
 * When an SstPartitionerFactory is configured, CompactRange() now automatically selects for compaction any files overlapping a partition boundary that is in the compaction range, even if no actual entries are in the requested compaction range. With this feature, manual compaction can be used to (re-)establish SST partition points when SstPartitioner changes, without a full compaction.
diff --git a/table/block_based/block_based_table_reader_impl.h b/table/block_based/block_based_table_reader_impl.h
index 1f6f5f223..0c52973a5 100644
--- a/table/block_based/block_based_table_reader_impl.h
+++ b/table/block_based/block_based_table_reader_impl.h
@@ -39,9 +39,13 @@ TBlockIter* BlockBasedTable::NewDataBlockIterator(
   if (rep_->uncompression_dict_reader && block_type == BlockType::kData) {
     CachableEntry<UncompressionDict> uncompression_dict;
     const bool no_io = (ro.read_tier == kBlockCacheTier);
+    // For async scans, don't use the prefetch buffer since an async prefetch
+    // might already be under way and this would invalidate it. Also, the
+    // uncompression dict is typically at the end of the file and would
+    // most likely break the sequentiality of the access pattern.
     s = rep_->uncompression_dict_reader->GetOrReadUncompressionDictionary(
-        prefetch_buffer, no_io, ro.verify_checksums, get_context,
-        lookup_context, &uncompression_dict);
+        ro.async_io ? nullptr : prefetch_buffer, no_io, ro.verify_checksums,
+        get_context, lookup_context, &uncompression_dict);
     if (!s.ok()) {
       iter->Invalidate(s);
       return iter;