PR #23627 opened by michaelni URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23627 Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23627.patch
Fixes: unbounded allocation / denial of service Fixes: tP59h4cpaFyg Fixes: 4ee05182b7 (avformat: Immersive Audio Model and Formats demuxer) Found-by: Adrian Junge (vurlo) Signed-off-by: Michael Niedermayer <[email protected]> >From 27be9b85ef97be80f2c5924ce59a206e08a5745b Mon Sep 17 00:00:00 2001 From: Michael Niedermayer <[email protected]> Date: Sun, 28 Jun 2026 22:05:28 +0200 Subject: [PATCH] avformat/iamf_parse: check count_label against the available bytes Fixes: unbounded allocation / denial of service Fixes: tP59h4cpaFyg Fixes: 4ee05182b7 (avformat: Immersive Audio Model and Formats demuxer) Found-by: Adrian Junge (vurlo) Signed-off-by: Michael Niedermayer <[email protected]> --- libavformat/iamf_parse.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/libavformat/iamf_parse.c b/libavformat/iamf_parse.c index d74a8677d6..4c2df2c9e6 100644 --- a/libavformat/iamf_parse.c +++ b/libavformat/iamf_parse.c @@ -1009,6 +1009,11 @@ static int mix_presentation_obu(void *s, IAMFContext *c, AVIOContext *pb, int le mix_presentation->cmix = mix; mix_presentation->count_label = ffio_read_leb(pbc); + if (mix_presentation->count_label > len - avio_tell(pbc)) { + mix_presentation->count_label = 0; + ret = AVERROR_INVALIDDATA; + goto fail; + } mix_presentation->language_label = av_calloc(mix_presentation->count_label, sizeof(*mix_presentation->language_label)); if (!mix_presentation->language_label) { -- 2.52.0 _______________________________________________ ffmpeg-devel mailing list -- [email protected] To unsubscribe send an email to [email protected]
