PR #21677 opened by michaelni URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/21677 Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/21677.patch
Fixes: use of uninitialized memory Fixes: 482494999/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_JPEG2000_DEC_fuzzer-6467586186608640 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <[email protected]> >From ce998935e801f9dcee7cca4ed71bf856b2153524 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer <[email protected]> Date: Sat, 7 Feb 2026 22:55:11 +0100 Subject: [PATCH] avcodec/jpeg2000htdec: Check Lcup and Lref Fixes: use of uninitialized memory Fixes: 482494999/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_JPEG2000_DEC_fuzzer-6467586186608640 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <[email protected]> --- libavcodec/jpeg2000htdec.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/libavcodec/jpeg2000htdec.c b/libavcodec/jpeg2000htdec.c index b92f0131a4..3f5ed1ce22 100644 --- a/libavcodec/jpeg2000htdec.c +++ b/libavcodec/jpeg2000htdec.c @@ -1254,6 +1254,9 @@ ff_jpeg2000_decode_htj2k(const Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c "Cleanup pass length must be at least 2 bytes in length\n"); return AVERROR_INVALIDDATA; } + if (Lcup + Lref != cblk->length) + return AVERROR_INVALIDDATA; + Dcup = cblk->data; Dref = cblk->data + Lcup; // Dref comes after the refinement segment -- 2.52.0 _______________________________________________ ffmpeg-devel mailing list -- [email protected] To unsubscribe send an email to [email protected]
