From: michaelni via ffmpeg-devel <ffmpeg-devel@ffmpeg.org>
To: ffmpeg-devel@ffmpeg.org
Cc: michaelni <code@ffmpeg.org>
Subject: [FFmpeg-devel] [PR] avcodec/aac/aacdec_usac: clip sfo (PR #22256)
Date: Sun, 22 Feb 2026 16:07:48 -0000
Message-ID: <177177646847.25.9800291313818287292@29965ddac10e> (raw)
PR #22256 opened by michaelni
URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/22256
Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/22256.patch
Fixes: out of array access
Fixes: 486160985/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AAC_DEC_fuzzer-4540415134203904
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
>From 319afd6f14d61ed9f299c3265fe7c53552fd8f21 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michael@niedermayer.cc>
Date: Sun, 22 Feb 2026 16:29:17 +0100
Subject: [PATCH] avcodec/aac/aacdec_usac: clip sfo
Fixes: out of array access
Fixes: 486160985/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AAC_DEC_fuzzer-4540415134203904
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
libavcodec/aac/aacdec_usac.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/aac/aacdec_usac.c b/libavcodec/aac/aacdec_usac.c
index 237a247d5b..4e6afd50f7 100644
--- a/libavcodec/aac/aacdec_usac.c
+++ b/libavcodec/aac/aacdec_usac.c
@@ -1025,7 +1025,7 @@ static void apply_noise_fill(AACDecContext *ac, SingleChannelElement *sce,
}
if (band_quantized_to_zero) {
- sce->sfo[g*ics->max_sfb + sfb] = FFMAX(sce->sfo[g*ics->max_sfb + sfb] + noise_offset, -200);
+ sce->sfo[g*ics->max_sfb + sfb] = av_clip(sce->sfo[g*ics->max_sfb + sfb] + noise_offset, -200, 227);
}
}
coef += g_len << 7;
--
2.52.0
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