CVE-2026-125224

MEDIUM 5.5

FFmpeg through 9.0.2 Vorbis Parser CPU Exhaustion via Invalid Extradata

CVSS Score

5.5

EPSS Score

0.0%

EPSS Percentile

0th

FFmpeg through 9.0.2 contains a denial of service vulnerability in libavcodec/vorbis_parser.c that re-parses invalid extradata for every packet when valid_extradata remains false. Attackers can supply crafted Ogg or Matroska Vorbis streams with large invalid extradata and many packets to exhaust CPU during demuxing or probing.

CWE	CWE-400
Vendor	ffmpeg
Product	ffmpeg
Published	Nov 9, 2026
Last Updated	Nov 9, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

FFmpeg / FFmpeg

0 ≤ 9.0.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

code.ffmpeg.org: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25694 github.com: https://github.com/FFmpeg/FFmpeg/commit/90f5e61a1da2dcc0050169af8ca593530f26071b github.com: https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/vorbis_parser.c#L312 github.com: https://github.com/FFmpeg/FFmpeg vulncheck.com: https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-vorbis-parser-cpu-exhaustion-via-invalid-extradata

Credits

Joshua Rogers (AISLE Research) Michael Niedermayer