Vulnerability in Ffmpeg
CVE-2026-125225
FFmpeg through 9.0.2 contains a NULL pointer dereference vulnerability in aac_adtstoasc_filter() that allows attackers to crash applications via oversized ADTS AAC packets. Attackers can supply a crafted file with a packet over 256 MB, overflowing the bit count so init_get_bits() fails unchecked and get_bits() crashes during MP4, Matroska, FLV or LATM remuxing.
Published · last modified .
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
Weakness classification (CWE)
References
- code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25569 (issue-tracking)
- github.com/FFmpeg/FFmpeg (product)
- github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/bsf/aac_adtstoasc.c (technical-description)
- github.com/FFmpeg/FFmpeg/commit/3b1cbb5e0f66b85d15f1d3527436520b3f4711ec (patch)
- www.vulncheck.com/advisories/ffmpeg-through-9.0.2-null-pointer-dereference-via-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-125225?
- CVE-2026-125225 is a medium-severity vulnerability in Ffmpeg, classified under CWE-252. CVSS score: 5.5/10. Published 2026-11-09.
- How severe is CVE-2026-125225?
- Medium severity. CVSS v3 base score is 5.5 out of 10.