FFmpeg before 8.1.3 contains an infinite loop vulnerability in the HLS demuxer that allows remote attackers to cause denial of service because parse_playlist() accepts Master Playlist tags inside Media Playlists. Attackers can trick victims into opening a crafted self-referencing playlist that endlessly adds variants in hls_read_header(), causing unbounded CPU and I/O consumption.
Fix
Patch, vendor advisory and mitigation references on NVD 6
- https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23618 Issue Tracking, Patch
- https://gist.github.com/OxBat/59574a2940092cda1b6e76bbf96f53d0 Exploit, Mitigation, Third Party Advisory
- https://github.com/FFmpeg/FFmpeg/commit/0e6eef35517a Patch
- https://github.com/FFmpeg/FFmpeg/commit/a4ddaba8bb78 Patch
- https://github.com/FFmpeg/FFmpeg/commit/c364ab176f722bdabc886845e770c9eacbc1e3e5 Patch
- https://www.vulncheck.com/advisories/ffmpeg-before-8.1.3-hls-demuxer-infinite-loop-via-self-referencing-playlist Patch, Third Party Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 7.1 · ffmpegNVD modified 2026-10-14 23:54
Affected (CPE criteria) 1
cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:*
References 8
- https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23618 Issue Tracking, Patch
- https://gist.github.com/OxBat/59574a2940092cda1b6e76bbf96f53d0 Exploit, Mitigation, Third Party Advisory
- https://github.com/FFmpeg/FFmpeg Product
- https://github.com/FFmpeg/FFmpeg/blob/n8.1.2/libavformat/hls.c#L866 Product
- https://github.com/FFmpeg/FFmpeg/commit/0e6eef35517a Patch
- https://github.com/FFmpeg/FFmpeg/commit/a4ddaba8bb78 Patch
- https://github.com/FFmpeg/FFmpeg/commit/c364ab176f722bdabc886845e770c9eacbc1e3e5 Patch
- https://www.vulncheck.com/advisories/ffmpeg-before-8.1.3-hls-demuxer-infinite-loop-via-self-referencing-playlist Patch, Third Party Advisory