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Git pushed a commit to branch release/6.1
in repository ffmpeg.

commit 420b2b20ddb42042de41c6a421ec527f036f225c
Author:     Michael Niedermayer <[email protected]>
AuthorDate: Mon Feb 16 01:38:53 2026 +0100
Commit:     Michael Niedermayer <[email protected]>
CommitDate: Mon May 4 17:13:20 2026 +0200

    avcodec/hevc/ps: Check bit_depth_cm in/out relation
    
    Fixes: Assertion n>0 && n<=25 failed at ./libavcodec/get_bits.h:3
    Fixes: 
472463689/clusterfuzz-testcase-minimized-ffmpeg_dem_HXVS_fuzzer-6012944883449856
    
    Found-by: continuous fuzzing process 
https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
    Signed-off-by: Michael Niedermayer <[email protected]>
    (cherry picked from commit 5ec37f61b2fff32aaa2bd3923a213b3dda4d67ea)
    Signed-off-by: Michael Niedermayer <[email protected]>
---
 libavcodec/hevc_ps.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libavcodec/hevc_ps.c b/libavcodec/hevc_ps.c
index fb997066d9..4606765db4 100644
--- a/libavcodec/hevc_ps.c
+++ b/libavcodec/hevc_ps.c
@@ -1395,6 +1395,10 @@ static int colour_mapping_table(GetBitContext *gb, 
AVCodecContext *avctx, HEVCPP
     pps->luma_bit_depth_cm_output   = get_ue_golomb(gb) + 8;
     pps->chroma_bit_depth_cm_output = get_ue_golomb(gb) + 8;
 
+    if (   pps->  luma_bit_depth_cm_output < pps->  luma_bit_depth_cm_input
+        || pps->chroma_bit_depth_cm_output < pps->chroma_bit_depth_cm_input)
+            return AVERROR_INVALIDDATA;
+
     pps->cm_res_quant_bits = get_bits(gb, 2);
     pps->cm_delta_flc_bits = get_bits(gb, 2) + 1;
 

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