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Fencer Vulns
high 8.8

CVE-2026-8461 json

Heap out-of-bounds write via odd slice_height in FFmpeg MagicYUV decoder

published 2026-06-18 4 mo ago modified 2026-07-25 3 mo ago also EUVD-2026-37878 , GHSA-qff7-4q6c-m8h6 , JLSEC-2026-653

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.6%
EPSS 1.6% chance of exploitation in 30 days, percentile 75%
public exploits
0
none known

Summary

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.

Patch / fix

  • julia FFMPEG_jll 8.1.2+0
  • julia FFMPEG_nogpl_jll 8.1.2+0
  • julia FFplay_jll 8.1.2+0
  • FFmpeg FFmpeg 8.1.2
  • Red Hat Red Hat Enterprise Linux AI 3.5 for RHEL 9 0:6.1.6-1.el9ai
  • ffmpeg Debian 13 7:7.1.5-0+deb13u1
  • ffmpeg Debian 14 7:8.1.2-1

debian advisories DEBIAN-CVE-2026-8461

  • ffmpeg Ubuntu Pro 20.04 LTS 7:4.2.7-0ubuntu0.1+esm17
  • ffmpeg Ubuntu Pro 22.04 LTS 7:4.4.2-0ubuntu0.22.04.1+esm16

ubuntu advisories UBUNTU-CVE-2026-8461

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • ffmpeg enterprise linux ai 3.0 6.1.6-9.el9ai
  • ffmpeg-free-rhai enterprise linux ai 3.0 6.1.6-9.el9ai
  • libavutil-free-rhai enterprise linux ai 3.0 6.1.6-9.el9ai
  • libavcodec-free-rhai enterprise linux ai 3.0 6.1.6-9.el9ai
  • libswscale-free-rhai enterprise linux ai 3.0 6.1.6-9.el9ai
  • libavdevice-free-rhai enterprise linux ai 3.0 6.1.6-9.el9ai
  • libavfilter-free-rhai enterprise linux ai 3.0 6.1.6-9.el9ai
  • libavformat-free-rhai enterprise linux ai 3.0 6.1.6-9.el9ai

red hat advisories RHSA-2026:74089RHSA-2026:43711

  • ffmpeg SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +10 more 3.4.2-150200.11.76.1
  • ffmpeg-4 SLE Workstation Extension 15 SP7, SLE Module for Package Hub 15 SP7 4.4.8-150600.13.52.1
  • ffmpeg-4 SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE High Performance Computing 15 SP4-LTSS +1 more 4.4.8-150400.3.72.1

suse advisories SUSE-SU-2026:3632-1SUSE-SU-2026:3542-1SUSE-SU-2026:3529-1

  • ffmpeg-7 openSUSE Leap 16.0 7.1.5-160000.1.1
  • ffmpeg-9 openSUSE Tumbleweed 9.0.1-1.1
  • ffmpeg-7 openSUSE Tumbleweed 7.1.5-1.1
  • ffmpeg-4 openSUSE Tumbleweed 4.4.8-2.1
  • ffmpeg-8 openSUSE Tumbleweed 8.1.2-2.1

opensuse advisories openSUSE-SU-2026:21877-1openSUSE-SU-2026:11515-1openSUSE-SU-2026:11384-1openSUSE-SU-2026:11360-1openSUSE-SU-2026:11347-1

  • ffmpeg Alpine 3.24 8.1.2-r0

alpine advisories ALPINE-CVE-2026-8461

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-8461 updated cvss 8.8

ffmpeg: FFmpeg: Remote code execution via out-of-bounds write in MagicYUV decoder

  • Red Hat AI Inference Server rhaii/vllm-cpu-rhel9, rhaii/vllm-cuda-rhel9, rhaii/vllm-rocm-rhel9 Red Hat Enterprise Linux AI (RHEL AI) 3 rhelai3/bootc-cuda-rhel9, rhelai3/bootc-rocm-rhel9, rhelai3/bootc-aws-cuda-rhel9, rhelai3/bootc-gcp-cuda-rhel9, rhelai3/bootc-azure-cuda-rhel9, rhelai3/bootc-azure-rocm-rhel9 Red Hat OpenShift AI (RHOAI) rhoai/odh-vllm-gaudi-rhel9
    affected: workaround, no fix available
  • Red Hat Enterprise Linux AI 3.0 for RHEL 9 ffmpeg 6.1.6-9.el9ai, ffmpeg-free-rhai 6.1.6-9.el9ai, libavutil-free-rhai 6.1.6-9.el9ai, libavcodec-free-rhai 6.1.6-9.el9ai, libswscale-free-rhai 6.1.6-9.el9ai, libavdevice-free-rhai 6.1.6-9.el9ai, +4 more
    fixed: vendor fix RHSA-2026:74089
  • Red Hat Enterprise Linux AI 3.5 for RHEL 9 ffmpeg 6.1.6-1.el9ai, ffmpeg-free-rhai 6.1.6-1.el9ai, libavutil-free-rhai 6.1.6-1.el9ai, libavcodec-free-rhai 6.1.6-1.el9ai, libswscale-free-rhai 6.1.6-1.el9ai, libavdevice-free-rhai 6.1.6-1.el9ai, +4 more
    fixed: vendor fix RHSA-2026:43711
  • Red Hat OpenShift AI 3.2 rhai/base-image-cpu-rhel9 1791232203, rhai/base-image-cpu-rhel9 1791818598, rhai/base-image-tpu-rhel9 1791231896, rhai/base-image-cuda-rhel9 1791232024, rhai/base-image-cuda-rhel9 1791818587, rhai/base-image-rocm-rhel9 1791231767, +4 more
    fixed: vendor fix RHSA-2026:82759

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
4 mo ago

Exploit prediction

1.57% chance of exploitation in the next 30 days, higher than 75% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CISA ADP 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
OSV 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
julia FFMPEG_jll
<8.1.2+0
8.1.2+0
julia FFMPEG_nogpl_jll
<8.1.2+0
8.1.2+0
julia FFplay_jll
<8.1.2+0
8.1.2+0

Affected products

  • FFmpeg FFmpeg
  • Red Hat Red Hat Enterprise Linux AI 3.5 for RHEL 9
  • Red Hat Red Hat AI Inference Server
  • Red Hat Red Hat Enterprise Linux AI (RHEL AI) 3
  • Red Hat Red Hat OpenShift AI (RHOAI)

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.