What is CVE-2026-125067?

CVE-2026-125067 is a medium-severity vulnerability in Ffmpeg, classified under CWE-252. CVSS score: 5.5/10. Published 2026-11-09.

How severe is CVE-2026-125067?

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

Vulnerability in Ffmpeg

CVE-2026-125067

FFmpeg through 9.0.2 contains a NULL pointer dereference vulnerability in vble_decode_frame() in libavcodec/vble.c because it ignores init_get_bits() failure on oversized packets. Attackers can supply a crafted AVI file with a 268435452-byte VBLE frame, causing reads from a NULL bit reader buffer that crash the process.

Published 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-252

References

code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25704 (issue-tracking)
github.com/FFmpeg/FFmpeg (product)
github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/vble.c (technical-description)
Patch Commit (patch)
VulnCheck Advisory: FFmpeg through 9.0.2 VBLE Decoder NULL Pointer Dereference via vble_decode_frame() (third-party-advisory)

Frequently asked questions

What is CVE-2026-125067?: CVE-2026-125067 is a medium-severity vulnerability in Ffmpeg, classified under CWE-252. CVSS score: 5.5/10. Published 2026-11-09.
How severe is CVE-2026-125067?: Medium severity. CVSS v3 base score is 5.5 out of 10.