Vulnerability in Ffmpeg
CVE-2026-125188
FFmpeg through 9.0.2 contains a heap out-of-bounds read vulnerability in libavcodec/proresenc_anatoliy.c that occurs when the prores_aw encoder processes interlaced, odd-height frames. Attackers can supply odd-height video that causes subimage_with_fill_template() to fill padding rows from memory before the fill_y buffer, leaking heap contents into the encoded output.
Published .
CVSS v3 metric
CVSS v3 base score 2.5 (Low). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N.
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/24490 (issue-tracking)
- github.com/FFmpeg/FFmpeg (product)
- github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/proresenc_anatoliy.c (technical-description)
- github.com/FFmpeg/FFmpeg/commit/ad2287d6d2511af66222e8f7e40d546bc8d461ec (patch)
- github.com/FFmpeg/FFmpeg/commit/d74f5e0559ba09d942c47687856349b03c1115dd (patch)
- www.vulncheck.com/advisories/ffmpeg-through-9.0.2-prores-prores-aw-heap-out-of-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-125188?
- CVE-2026-125188 is a low-severity vulnerability in Ffmpeg, classified under Buffer Under-read. CVSS score: 2.5/10. Published 2026-11-09.
- How severe is CVE-2026-125188?
- Low severity. CVSS v3 base score is 2.5 out of 10.