From 263374ac7d540fceccc97e00df57d028efed92dd Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michael@niedermayer.cc>
Date: Sun, 31 May 2026 19:50:57 +0200
Subject: [PATCH] avcodec/aac/aacdec_usac: reject explicit
 usacSamplingFrequency of 0

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavcodec/aac/aacdec_usac.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavcodec/aac/aacdec_usac.c b/libavcodec/aac/aacdec_usac.c
index 0f1bb50a99..e484d6504c 100644
--- a/libavcodec/aac/aacdec_usac.c
+++ b/libavcodec/aac/aacdec_usac.c
@@ -377,6 +377,8 @@ int ff_aac_usac_config_decode(AACDecContext *ac, AVCodecContext *avctx,
     freq_idx = get_bits(gb, 5); /* usacSamplingFrequencyIndex */
     if (freq_idx == 0x1f) {
         samplerate = get_bits(gb, 24); /* usacSamplingFrequency */
+        if (samplerate == 0)
+            return AVERROR(EINVAL);
     } else {
         samplerate = ff_aac_usac_samplerate[freq_idx];
         if (samplerate < 0)