CVE-2026-125200 FFmpeg through 9.0.2 Memory Leak via libx265 Dolby Vision RPU Payloads

Medium 6.8 Published 9 Nov 2026 Updated 9 Nov 2026

Exploited in the wild: Not known
Fix: None listed

What is CVE-2026-125200?

CVE-2026-125200 is a medium-severity vulnerability in FFmpeg, published on 9 Nov 2026.

Official 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.

Weakness: CWE-401

Which versions are affected by CVE-2026-125200?

How do I fix CVE-2026-125200?

No fix has been published for CVE-2026-125200 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-125200 being exploited?

There is no known exploitation of CVE-2026-125200 in the wild and no public exploit code.

Sources

Also known as GHSA-9mj7-c5fq-6cm5, UBUNTU-CVE-2026-125200.