CVE-2026-52296 Memory corruption in FFmpeg

Low 2.9 Published 13 Sep 2026 Updated 15 Sep 2026

An out-of-bounds read in FFmpeg's WMA encoder allows attackers to cause denial of service or disclose sensitive memory contents.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2026-52296?

CVE-2026-52296 is a low-severity memory corruption vulnerability in Ffmpeg Ffmpeg, published on 13 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

FFmpeg before 9.0 has an out-of-bounds read because of missing required padding in WMA extradata allocation paths in libavcodec/wmaenc.c.

Weakness: CWE-125

Which versions are affected by CVE-2026-52296?

It affects 1 product.

Products include Ffmpeg Ffmpeg.

How do I fix CVE-2026-52296?

Upgrade to a fixed version.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2026-52296 being exploited?

There is no known exploitation of CVE-2026-52296 in the wild and no public exploit code.

All Ffmpeg Ffmpeg vulnerabilities

Sources

Also known as DEBIAN-CVE-2026-52296, GHSA-923g-f8rq-pv4w, UBUNTU-CVE-2026-52296.