CVE-2026-8461
Heap out-of-bounds write via odd slice_height in FFmpeg MagicYUV decoder
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.
INFO
Published Date :
June 18, 2026, 2:17 p.m.
Last Modified :
June 30, 2026, 3:21 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | 48a46f29-ae42-4e1d-90dd-c1676c1e5e6d | ||||
| CVSS 3.1 | HIGH | MITRE-CVE | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c |
Solution
- Update FFmpeg to version 8.1.2 or later.
- Apply relevant security patches for FFmpeg.
- Recompile FFmpeg with updated libraries.
Public PoC/Exploit Available at Github
CVE-2026-8461 has a 15 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-8461.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-8461 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-8461
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
Dockerfile Python Shell CSS JavaScript HTML
None
Dockerfile Python Shell CSS JavaScript HTML
patched ffmpeg-tools for jellyfin to patch CVE-2026-8461 aka PixelSmash
PowerShell
Daily tech-watch digest (AI, dev, DevOps, data, cloud). Auto-published from my watch on baptisteblouin.fr
ai artificial-intelligence automation cloud cloudflare-workers data-engineering devops digest github-actions llm machine-learning mlops newsletter rss tech-news tech-watch ai-news
JavaScript
Offline AI-powered Meeting Intelligence System for Secure Environments.
Dockerfile Python Shell CSS JavaScript HTML
None
Dockerfile Python Shell CSS JavaScript HTML
CVE-2026-8461
Python
CVE-2026-8461 - Draft
None
Python
None
Dockerfile Python Mako CSS SCSS HTML JavaScript TypeScript Shell Makefile
None
Python
FFmpeg n8.1.2 corresponding source (LGPL-2.1+) for the JellyLens visionOS app
Shell
Music player written with ffmpeg, C++/CLI, and WPF. WIP.
C++ C C#
None
Python
Speakr is a personal, self-hosted web application designed for transcribing audio recordings
Python Shell HTML Dockerfile CSS JavaScript
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-8461 vulnerability anywhere in the article.
-
security.nl
Kritiek beveiligingslek in FFmpeg maakt remote code execution mogelijk
Een kritieke kwetsbaarheid in het zeer veelgebruikte 'multimedia framework' FFmpeg maakt remote code execution mogelijk als er een speciaal geprepareerd mediabestand wordt verwerkt. In het geval van b ... Read more
The following table lists the changes that have been made to the
CVE-2026-8461 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Jun. 30, 2026
Action Type Old Value New Value Added Affected [{'cpes': ['cpe:/a:redhat:ai_inference_server:3'], 'vendor': 'Red Hat', 'product': 'Red Hat AI Inference Server', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:enterprise_linux_ai:3'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux AI (RHEL AI) 3', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:openshift_ai'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift AI (RHOAI)', 'defaultStatus': 'affected'}] Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Added CWE CWE-787 Added Reference https://access.redhat.com/security/cve/CVE-2026-8461 Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2490308 Added Reference https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-8461.json -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 19, 2026
Action Type Old Value New Value Changed SSVC {'id': 'CVE-2026-8461', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-18T12:26:45.287776Z'} {'id': 'CVE-2026-8461', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-18T00:00:00+00:00'} -
New CVE Received by [email protected]
Jun. 18, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'FFmpeg', 'modules': ['libavcodec'], 'product': 'FFmpeg', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '8.1.2', 'versionType': 'custom'}], 'programFiles': ['libavcodec/magicyuv.c'], 'defaultStatus': 'unaffected'}] Added 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Added CWE CWE-787 Added Reference https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23159 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 18, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-8461', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-18T12:26:45.287776Z'}