# CVE-2026-65705

## Summary

- **CVE ID:** CVE-2026-65705
- **Severity:** HIGH
- **CVSS Score:** 7.8 (CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-787, CWE-131
- **Published:** Jul 23, 2026
- **Last Modified:** Jul 28, 2026

## Description

FFmpeg versions 3.4 through 8.1.2 contain an out-of-bounds write vulnerability in the vf_floodfill video filter that allows attackers to corrupt heap memory by supplying a dynamically sized video stream with filtergraph reinitialization disabled via -reinit_filter 0. When config_input() allocates the points traversal stack based on initial frame dimensions and a subsequent larger frame is processed, filter_frame() performs flood-fill neighbor pushes beyond the original allocation boundary, resulting in heap corruption and process crash with potential for code execution depending on heap layout and process hardening.

## Affected Products

- FFmpeg — FFmpeg (3.4)
- FFmpeg — FFmpeg (f186c50cf53aec20e9a29059cb22ca3f2d59201c)

## References

- [CNA](https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23780)
- [CNA](https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/f186c50cf53aec20e9a29059cb22ca3f2d59201c)
- [CNA](https://www.vulncheck.com/advisories/ffmpeg-vf-floodfill-out-of-bounds-write-via-filter-frame)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.19%
- **EPSS Percentile:** 8.4

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._