From e813b8fd197c60a299dbb96f9b46c18143f46148 Mon Sep 17 00:00:00 2001
From: Zaggy1024 <zaggy1024@gmail.com>
Date: Sat, 11 Feb 2023 20:08:09 -0600
Subject: [PATCH] LibVideo/Matroska: Fix out-of-bounds access when seeking to
 cues

---
 Userland/Libraries/LibVideo/Containers/Matroska/Reader.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Userland/Libraries/LibVideo/Containers/Matroska/Reader.cpp b/Userland/Libraries/LibVideo/Containers/Matroska/Reader.cpp
index a0e9c780f0..70551ae07f 100644
--- a/Userland/Libraries/LibVideo/Containers/Matroska/Reader.cpp
+++ b/Userland/Libraries/LibVideo/Containers/Matroska/Reader.cpp
@@ -797,8 +797,8 @@ DecoderErrorOr<void> Reader::seek_to_cue_for_timestamp(SampleIterator& iterator,
         return {};
     }
 
-    while (index < cue_points.size()) {
-        auto const& cue_point = cue_points[++index];
+    while (++index < cue_points.size()) {
+        auto const& cue_point = cue_points[index];
         dbgln_if(MATROSKA_DEBUG, "Checking future cue point {}ms", cue_point.timestamp().to_milliseconds());
         if (cue_point.timestamp() > timestamp)
             break;