# CVE-2026-65706

## Summary

- **CVE ID:** CVE-2026-65706
- **Severity:** HIGH
- **CVSS Score:** 8.5 (CVSS:4.0/AV:L/AC:L/AT:N/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 3.0 through 8.1.2 contain an out-of-bounds write vulnerability in the vf_swaprect video filter that allows attackers to corrupt heap memory by supplying a crafted NV12 video frame with odd width dimensions. The filter_frame() function reuses a temporary row buffer sized for plane 0's single-byte pixel step across all planes, causing an 18-byte memcpy into a 17-byte heap allocation when processing the two-byte-per-sample interleaved chroma plane of a 17x16 NV12 frame, resulting in heap corruption and process crash with potential for code execution.

## Affected Products

- FFmpeg — FFmpeg (3.0)
- FFmpeg — FFmpeg (a7e38b617b32f996beaa371bbf04b39907d7a527)

## References

- [CNA](https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23779)
- [CNA](https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/a7e38b617b32f996beaa371bbf04b39907d7a527)
- [CNA](https://www.vulncheck.com/advisories/ffmpeg-vf-swaprect-out-of-bounds-write-via-nv12-frame-processing)

## Exploitation Prediction (EPSS)

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

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._