From ce4f75ae5de4be215c9d8f157ed47e79a11fe4dd Mon Sep 17 00:00:00 2001
From: Andreas Huber <andreas.huber@intel.com>
Date: Wed, 10 Dec 2025 07:51:48 -0800
Subject: [PATCH] fix(search-buffer): ASan heap-buffer-underflow in
 SearchBuffer::can_skip

---
 include/svs/index/vamana/search_buffer.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/svs/index/vamana/search_buffer.h b/include/svs/index/vamana/search_buffer.h
index f9d761fb7..437c03bd8 100644
--- a/include/svs/index/vamana/search_buffer.h
+++ b/include/svs/index/vamana/search_buffer.h
@@ -340,7 +340,7 @@ template <typename Idx, typename Cmp = std::less<>> class SearchBuffer {
     /// returns ``true``.
     ///
     bool can_skip(float distance) const {
-        return compare_(back().distance(), distance) && full();
+        return full() && (capacity() == 0 || compare_(back().distance(), distance));
     }
 
     ///