FFmpeg through 9.0.2 Memory Leak via libx265 Dolby Vision RPU Payloads

Advisories

FFmpeg through 9.0.2 Memory Leak via libx265 Dolby Vision RPU Payloads

Severity: medium
Date: 11/9/2026
Affecting: FFmpeg >= 7.1, <= 9.0.2
CVE: CVE-2026-125200
CWE: CWE-401 Missing Release of Memory after Effective Lifetime
CVSS: 6.8
CVSS V4 Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/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/libx265.c#L880
https://github.com/FFmpeg/FFmpeg
Credit: Joshua Rogers (AISLE Research), Michael Niedermayer
Description: FFmpeg through 9.0.2 contains a memory leak vulnerability in libavcodec/libx265.c because libx265_encode_frame() never frees the rpu.payload allocated by ff_dovi_rpu_generate(). Attackers can supply crafted Dolby Vision HEVC or AV1 files that leak one RPU allocation per encoded frame during libx265 transcoding, causing unbounded memory growth and denial of service.

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