PR #23281 opened by michaelni
URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23281
Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23281.patch

Fixes: out of array access
Found-by: jiale yao
Signed-off-by: Michael Niedermayer <[email protected]>


>From 12beba9f860169a9bcf9ed0a7f3dd094ef582e46 Mon Sep 17 00:00:00 2001
From: jiale yao <[email protected]>
Date: Sat, 30 May 2026 21:40:12 +0200
Subject: [PATCH] avfilter/avf_showcwt: fix out-of-bounds read in du scroll

Fixes: out of array access
Found-by: jiale yao
Signed-off-by: Michael Niedermayer <[email protected]>
---
 libavfilter/avf_showcwt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavfilter/avf_showcwt.c b/libavfilter/avf_showcwt.c
index 839bdc7983..4c4edaa768 100644
--- a/libavfilter/avf_showcwt.c
+++ b/libavfilter/avf_showcwt.c
@@ -1060,7 +1060,7 @@ static int output_frame(AVFilterContext *ctx)
             for (int p = 0; p < nb_planes; p++) {
                 ptrdiff_t linesize = s->outpicref->linesize[p];
 
-                for (int y = 0; y < s->sono_size; y++) {
+                for (int y = 0; y < s->sono_size - 1; y++) {
                     uint8_t *dst = s->outpicref->data[p] + y * linesize;
 
                     memmove(dst, dst + linesize, s->w);
-- 
2.52.0

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