CVE-2026-8461 Heap out-of-bounds write via odd slice_height in FFmpeg MagicYUV decoder
Heap out-of-bounds write in FFmpeg's MagicYUV decoder allows remote code execution or denial of service via crafted media files.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-8461?
CVE-2026-8461 is a high-severity memory corruption vulnerability in FFmpeg, published on 18 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
An out-of-bounds write vulnerability in FFmpeg's libavcodec library, specifically in the MagicYUV decoder, allows denial-of-service and, in some cases, can be exploited for remote code execution.
This vulnerability is associated with the file libavcodec/magicyuv.C.
This issue affects FFmpeg before version 8.1.2.
Weakness: CWE-787
Which versions are affected by CVE-2026-8461?
Linux distribution packages (14)
ffmpeg SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | All versions | 3.4.2-150200.11.76.1 |
ffmpeg SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS | All versions | 3.4.2-150200.11.76.1 |
ffmpeg SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS | All versions | 3.4.2-150200.11.76.1 |
ffmpeg SUSE:Linux Enterprise High Performance Computing 15 SP5-LTSS | All versions | 3.4.2-150200.11.76.1 |
ffmpeg SUSE:Linux Enterprise Module for Desktop Applications 15 SP7 | All versions | 3.4.2-150200.11.76.1 |
ffmpeg SUSE:Linux Enterprise Module for Package Hub 15 SP7 | All versions | 3.4.2-150200.11.76.1 |
ffmpeg SUSE:Linux Enterprise Server 15 SP4-LTSS | All versions | 3.4.2-150200.11.76.1 |
ffmpeg SUSE:Linux Enterprise Server 15 SP5-LTSS | All versions | 3.4.2-150200.11.76.1 |
ffmpeg SUSE:Linux Enterprise Server 15 SP6-LTSS | All versions | 3.4.2-150200.11.76.1 |
ffmpeg SUSE:Linux Enterprise Server for SAP Applications 15 SP4 | All versions | 3.4.2-150200.11.76.1 |
ffmpeg SUSE:Linux Enterprise Server for SAP Applications 15 SP5 | All versions | 3.4.2-150200.11.76.1 |
ffmpeg SUSE:Linux Enterprise Server for SAP Applications 15 SP6 | All versions | 3.4.2-150200.11.76.1 |
ffmpeg SUSE:Linux Enterprise Workstation Extension 15 SP7 | All versions | 3.4.2-150200.11.76.1 |
ffmpeg-7 openSUSE:Tumbleweed | All versions | 7.1.5-1.1 |
How do I fix CVE-2026-8461?
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-2026-8461 being exploited?
There is no known exploitation of CVE-2026-8461 in the wild and no public exploit code.
Public exploit code: 5 proofs of concept on GitHub.
Sources
Also known as DEBIAN-CVE-2026-8461, ECHO-7145-ec7d-a2dc, GHSA-qff7-4q6c-m8h6, JLSEC-2026-653, MGASA-2026-0249, MINI-77jm-4x75-3xjg and 5 more.