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commit c0ef29e3c74f229b4feaea9357707e3690968397 Author: Michael Niedermayer <[email protected]> AuthorDate: Sat May 2 23:35:49 2026 +0200 Commit: Michael Niedermayer <[email protected]> CommitDate: Tue May 5 16:03:29 2026 +0200 avformat/avidec: check LIST size in avi_load_index() This avoids an unsigned integer underflow and passing that large value to ff_read_riff_info() (cherry picked from commit 2678bce860877ac95423e63f7858dbb96d3e255b) Signed-off-by: Michael Niedermayer <[email protected]> --- libavformat/avidec.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/libavformat/avidec.c b/libavformat/avidec.c index c65ea78b72..4c65397d93 100644 --- a/libavformat/avidec.c +++ b/libavformat/avidec.c @@ -1822,6 +1822,10 @@ static int avi_load_index(AVFormatContext *s) avi->index_loaded=2; ret = 0; }else if (tag == MKTAG('L', 'I', 'S', 'T')) { + if (size < 4) { + av_log(s, AV_LOG_WARNING, "Invalid size (%u) LIST in index\n", size); + break; + } uint32_t tag1 = avio_rl32(pb); if (tag1 == MKTAG('I', 'N', 'F', 'O')) _______________________________________________ ffmpeg-cvslog mailing list -- [email protected] To unsubscribe send an email to [email protected]
