What is CVE-2026-125224?

CVE-2026-125224 is a medium-severity vulnerability in Ffmpeg, classified under Uncontrolled Resource Consumption. CVSS score: 5.5/10. Published 2026-11-09.

How severe is CVE-2026-125224?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Resource exhaustion in Ffmpeg

CVE-2026-125224

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.

Vulnerability class: DoS (Denial of Service)

Published 2026-11-09 · last modified 2026-11-09.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Ffmpeg

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25694 (issue-tracking)
github.com/FFmpeg/FFmpeg (product)
github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/vorbis_parser.c (technical-description)
github.com/FFmpeg/FFmpeg/commit/90f5e61a1da2dcc0050169af8ca593530f26071b (patch)
www.vulncheck.com/advisories/ffmpeg-through-9.0.2-vorbis-parser-cpu-exhaustion-… (third-party-advisory)

Frequently asked questions

What is CVE-2026-125224?: CVE-2026-125224 is a medium-severity vulnerability in Ffmpeg, classified under Uncontrolled Resource Consumption. CVSS score: 5.5/10. Published 2026-11-09.
How severe is CVE-2026-125224?: Medium severity. CVSS v3 base score is 5.5 out of 10.