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no-senders; approved; loop; banned-address; header-match-ffmpeg-devel.ffmpeg.org-0; header-match-ffmpeg-devel.ffmpeg.org-1; header-match-ffmpeg-devel.ffmpeg.org-2; header-match-ffmpeg-devel.ffmpeg.org-3; emergency; member-moderation X-Mailman-Version: 3.3.10 Precedence: list Reply-To: FFmpeg development discussions and patches Subject: [FFmpeg-devel] [PR] avformat/wtvdec: Check that language is fully read (PR #22254) List-Id: FFmpeg development discussions and patches Archived-At: Archived-At: List-Archive: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: From: michaelni via ffmpeg-devel Cc: michaelni Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Archived-At: List-Archive: List-Post: PR #22254 opened by michaelni URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/22254 Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/22254.patch Fixes: use-of-uninitialized-value Fixes: 483856523/clusterfuzz-testcase-minimized-ffmpeg_dem_WTV_fuzzer-5221422609006592 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer >>From ad28d78639c4cbbb7f4975977e777206896e4e9e Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sun, 22 Feb 2026 13:47:23 +0100 Subject: [PATCH] avformat/wtvdec: Check that language is fully read Fixes: use-of-uninitialized-value Fixes: 483856523/clusterfuzz-testcase-minimized-ffmpeg_dem_WTV_fuzzer-5221422609006592 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavformat/wtvdec.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/libavformat/wtvdec.c b/libavformat/wtvdec.c index 1f299510c9..50d019a03f 100644 --- a/libavformat/wtvdec.c +++ b/libavformat/wtvdec.c @@ -881,7 +881,8 @@ static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_p AVStream *st = s->streams[stream_index]; uint8_t language[4]; avio_skip(pb, 12); - avio_read(pb, language, 3); + if (avio_read(pb, language, 3) != 3) + return AVERROR_INVALIDDATA; if (language[0]) { language[3] = 0; av_dict_set(&st->metadata, "language", language, 0); -- 2.52.0 _______________________________________________ ffmpeg-devel mailing list -- ffmpeg-devel@ffmpeg.org To unsubscribe send an email to ffmpeg-devel-leave@ffmpeg.org