From 7306c2fa5c37e07fcaa91fbb273dabb7d3ff6492 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Tue, 10 Feb 2026 22:46:58 +0100 Subject: [PATCH] avformat/cafdec: Check nb_entries in read_info_chunk() Fixes: Timeout Fixes: 477315122/clusterfuzz-testcase-minimized-ffmpeg_dem_CAF_fuzzer-5274792315125760 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer (cherry picked from commit 4f97e52042bd3e2bc2fbb67bd74fb4216cc7a916) Signed-off-by: Michael Niedermayer --- libavformat/cafdec.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/libavformat/cafdec.c b/libavformat/cafdec.c index 82b5bda4ac..c470e8e9f4 100644 --- a/libavformat/cafdec.c +++ b/libavformat/cafdec.c @@ -281,6 +281,10 @@ static void read_info_chunk(AVFormatContext *s, int64_t size) AVIOContext *pb = s->pb; unsigned int i; unsigned int nb_entries = avio_rb32(pb); + + if (3LL * nb_entries > size) + return; + for (i = 0; i < nb_entries && !avio_feof(pb); i++) { char key[32]; char value[1024];