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Tue, 27 Jan 2026 18:40:55 +0200 (EET) MIME-Version: 1.0 To: ffmpeg-devel@ffmpeg.org Date: Tue, 27 Jan 2026 16:40:55 -0000 Message-ID: <176953205562.25.11167763570974476295@4457048688e7> Message-ID-Hash: ZYVXY7COQUVHKU66WG5LFI4N52GUNOPK X-Message-ID-Hash: ZYVXY7COQUVHKU66WG5LFI4N52GUNOPK 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] avformat/hlsenc: fix format string vulnerability in parse_playlist (alternative fix) (PR #21599) 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 #21599 opened by michaelni URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/21599 Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/21599.patch Found-by: Sarthak Munshi Signed-off-by: Michael Niedermayer >>From 1739a50cdba18bbb4e1b6ea19fbf37f2b5e1f114 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Tue, 27 Jan 2026 16:57:30 +0100 Subject: [PATCH] avformat/hlsenc: fix format string vulnerability in parse_playlist (alternative fix) Found-by: Sarthak Munshi Signed-off-by: Michael Niedermayer --- libavformat/hlsenc.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/libavformat/hlsenc.c b/libavformat/hlsenc.c index 7105404d1e..ee64a5a275 100644 --- a/libavformat/hlsenc.c +++ b/libavformat/hlsenc.c @@ -1242,13 +1242,13 @@ static int parse_playlist(AVFormatContext *s, const char *url, VariantStream *vs if (vs->has_subtitle) { int vtt_index = extract_segment_number(line); const char *vtt_basename = av_basename(vs->vtt_basename); - int len = strlen(vtt_basename) + 11; - char *vtt_file = av_mallocz(len); - if (!vtt_file) { + char *vtt_file = NULL; + int ret = replace_int_data_in_filename(&vtt_file, vtt_basename, 'd', vtt_index); + if (ret < 0 || !vtt_file) { ret = AVERROR(ENOMEM); goto fail; } - snprintf(vtt_file, len, vtt_basename, vtt_index); + ff_format_set_url(vs->vtt_avf, vtt_file); } -- 2.52.0 _______________________________________________ ffmpeg-devel mailing list -- ffmpeg-devel@ffmpeg.org To unsubscribe send an email to ffmpeg-devel-leave@ffmpeg.org