FFmpeg through 9.0.2 Heap Buffer Overflow via liboapv APV Encoder Wrapper

Advisories

FFmpeg through 9.0.2 Heap Buffer Overflow via liboapv APV Encoder Wrapper

Severity: high
Date: 11/9/2026
Affecting: FFmpeg >= 8.0, <= 9.0.2
CVE: CVE-2026-125196
CWE: CWE-122 Heap-based Buffer Overflow
CVSS: 7.3
CVSS V4 Vector: CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
References: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25416
Patch Commit
https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/liboapvenc.c#L578
https://github.com/FFmpeg/FFmpeg
Credit: Joshua Rogers (AISLE Research), Michael Niedermayer
Description: FFmpeg through 9.0.2 contains a heap buffer overflow vulnerability in liboapve_encode() in libavcodec/liboapvenc.c that allows attackers to corrupt heap memory by supplying frames larger than the configured encoder dimensions. Attackers can craft videos whose resolution changes mid-stream so that transcoding to APV without rescaling writes attacker-controlled pixel data past the imgb plane buffers.

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