Vulnerability in FFmpeg

[ Why it matters ]Priority signals

• Public proof-of-concept exploit exists (CISA SSVC)

[ Description ]Official description

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.

[ Fixes ]Fixes and patches

• Patch on code.ffmpeg.orgVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD
• Patch on github.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD
• Patch on github.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD
• Patch on github.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD
• Patch on vulncheck.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD

[ Advisories ]Government CERT advisories

• BSI CERT-Bund8 Oct 2026WID-SEC-2026-3820

  ffmpeg: Multiple vulnerabilities Translated from German

  CVE-2026-107675CVE-2026-107697CVE-2026-107676+6 more CVEs

[ References ]References

• code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23618Issue TrackingPatch
• gist.github.com/OxBat/59574a2940092cda1b6e76bbf96f53d0ExploitMitigationThird Party Advisory
• github.com/FFmpeg/FFmpegProduct
• github.com/FFmpeg/FFmpeg/blob/n8.1.2/libavformat/hls.cProduct
• github.com/FFmpeg/FFmpeg/commit/0e6eef35517aPatch
• github.com/FFmpeg/FFmpeg/commit/a4ddaba8bb78Patch
• github.com/FFmpeg/FFmpeg/commit/c364ab176f722bdabc886845e770c9eacbc1e3e5Patch
• www.vulncheck.com/advisories/ffmpeg-before-8.1.3-hls-demuxer-infinite-loop-via-self-ref…PatchThird Party Advisory