CVE-2026-65706

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 v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/a7e38b617b32f996beaa371bbf04b39907d7a527
https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23779
https://www.vulncheck.com/advisories/ffmpeg-vf-swaprect-out-of-bounds-write-via-nv12-frame-processing

Configurations

No configuration.

History

23 Jul 2026, 20:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-23 20:17

Updated : 2026-07-27 20:34

NVD link : CVE-2026-65706

Mitre link : CVE-2026-65706

CVE.ORG link : CVE-2026-65706

JSON object : View

Products Affected

No product.

CWE

CWE-131

Incorrect Calculation of Buffer Size

CWE-787

Out-of-bounds Write

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