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Sat, 7 Feb 2026 03:54:50 +0200 (EET) MIME-Version: 1.0 To: ffmpeg-devel@ffmpeg.org Date: Sat, 07 Feb 2026 01:54:49 -0000 Message-ID: <177042929034.25.14125203962498488208@4457048688e7> Message-ID-Hash: X34BE4JOHJURY4DXMMLMG7VXN7CA6ZAO X-Message-ID-Hash: X34BE4JOHJURY4DXMMLMG7VXN7CA6ZAO X-MailFrom: code@ffmpeg.org X-Mailman-Rule-Hits: nonmember-moderation X-Mailman-Rule-Misses: dmarc-mitigation; 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] avcodec/pnmdec: Check input size against width*height assuming at least 1bit per pixel (PR #21672) 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 #21672 opened by michaelni URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/21672 Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/21672.patch Fixes: Timeout Fixes: 481427018/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PHM_DEC_fuzzer-6315469467615232 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer >>From b14045627831592cc4013424a7e93c186fd927db Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 7 Feb 2026 00:35:29 +0100 Subject: [PATCH] avcodec/pnmdec: Check input size against width*height assuming at least 1bit per pixel Fixes: Timeout Fixes: 481427018/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PHM_DEC_fuzzer-6315469467615232 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/pnmdec.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/libavcodec/pnmdec.c b/libavcodec/pnmdec.c index 68bb7a41ec..b99b26a390 100644 --- a/libavcodec/pnmdec.c +++ b/libavcodec/pnmdec.c @@ -63,6 +63,9 @@ static int pnm_decode_frame(AVCodecContext *avctx, AVFrame *p, if (avctx->skip_frame >= AVDISCARD_ALL) return avpkt->size; + if (avctx->width * avctx->height / 8 > s->bytestream_end - s->bytestream) + return AVERROR_INVALIDDATA; + if ((ret = ff_get_buffer(avctx, p, 0)) < 0) return ret; avctx->bits_per_raw_sample = av_log2(s->maxval) + 1; -- 2.52.0 _______________________________________________ ffmpeg-devel mailing list -- ffmpeg-devel@ffmpeg.org To unsubscribe send an email to ffmpeg-devel-leave@ffmpeg.org