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Git pushed a commit to branch release/4.4
in repository ffmpeg.

commit fe2afafc7607b99fc0cd785f5b8c9f1bb124512c
Author:     Michael Niedermayer <[email protected]>
AuthorDate: Tue Feb 10 20:47:25 2026 +0100
Commit:     Michael Niedermayer <[email protected]>
CommitDate: Tue May 5 18:55:02 2026 +0200

    avcodec/interplayacm: Check input for fill_block()
    
    Fixes: Timeout
    Fixes: 
476763877/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_INTERPLAY_ACM_fuzzer-4515681843609600
    
    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 2ab23ec7295f3e6f71695467d00dba504dc3843c)
    Signed-off-by: Michael Niedermayer <[email protected]>
---
 libavcodec/interplayacm.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libavcodec/interplayacm.c b/libavcodec/interplayacm.c
index 3704d1a2f2..0253f425de 100644
--- a/libavcodec/interplayacm.c
+++ b/libavcodec/interplayacm.c
@@ -423,6 +423,9 @@ static int fill_block(InterplayACMContext *s)
     unsigned i, ind;
     int ret;
 
+    if (get_bits_left(gb) < s->cols * 5)
+        return AVERROR_INVALIDDATA;
+
     for (i = 0; i < s->cols; i++) {
         ind = get_bits(gb, 5);
         ret = filler_list[ind](s, ind, i);

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