Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ffmpeg | Ffmpeg | >= 3.0, <= 8.1.2 |
Related Weaknesses (CWE)
References
- https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/a7e38b617b32f996beaa371bbf04b39907dPatch
- https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23779Issue TrackingPatch
- https://www.vulncheck.com/advisories/ffmpeg-vf-swaprect-out-of-bounds-write-via-Third Party Advisory
FAQ
What is CVE-2026-65706?
CVE-2026-65706 is a vulnerability with a CVSS score of 7.8 (HIGH). 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...
How severe is CVE-2026-65706?
CVE-2026-65706 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-65706?
Check the references section above for vendor advisories and patch information. Affected products include: Ffmpeg Ffmpeg.