Out-of-bounds write in FFmpeg - CVE-2026-8461

Vulnerability identifier: #VU135066

CSH Severity: High

CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-8461

CWE-ID: CWE-787

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error within the MagicYUV decoder in libavcodec/magicyuv.c. A remote attacker can pass specially crafted media content to the library, trigger an out-of-bounds write and execute arbitrary code on the target system.

FFmpeg
Debian Linux
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Package Hub 15
Desktop Applications Module
libpostproc54
libavresample-devel
libavformat-devel
libavcodec-devel
libavdevice57
libavdevice57-debuginfo
ffmpeg
libavfilter6-debuginfo
libavfilter6
libavutil55
libavformat57
libavformat57-debuginfo
libavutil55-debuginfo
libavcodec57
ffmpeg-debuginfo
libswresample2-debuginfo
libswscale4-debuginfo
libswscale4
libavcodec57-debuginfo
libswresample2
libswresample-devel
ffmpeg-debugsource
libavutil-devel
libpostproc54-debuginfo
libavresample3-debuginfo
libpostproc-devel
libavresample3
libswscale-devel
ffmpeg (Debian package)

Install updates from vendor's website.

FFmpeg - addressed in versions 4.4.8, 5.1.10, 6.1.6, 7.1.5, 8.0.3, 8.1.2
libpostproc54 - update to 3.4.2-150200.11.76.1
libavresample-devel - update to 3.4.2-150200.11.76.1
libavformat-devel - update to 3.4.2-150200.11.76.1
libavcodec-devel - update to 3.4.2-150200.11.76.1
libavdevice57 - update to 3.4.2-150200.11.76.1
libavdevice57-debuginfo - update to 3.4.2-150200.11.76.1
ffmpeg - update to 3.4.2-150200.11.76.1
libavfilter6-debuginfo - update to 3.4.2-150200.11.76.1
libavfilter6 - update to 3.4.2-150200.11.76.1
libavutil55 - update to 3.4.2-150200.11.76.1
libavformat57 - update to 3.4.2-150200.11.76.1
libavformat57-debuginfo - update to 3.4.2-150200.11.76.1
libavutil55-debuginfo - update to 3.4.2-150200.11.76.1
libavcodec57 - update to 3.4.2-150200.11.76.1
ffmpeg-debuginfo - update to 3.4.2-150200.11.76.1
libswresample2-debuginfo - update to 3.4.2-150200.11.76.1
libswscale4-debuginfo - update to 3.4.2-150200.11.76.1
libswscale4 - update to 3.4.2-150200.11.76.1
libavcodec57-debuginfo - update to 3.4.2-150200.11.76.1
libswresample2 - update to 3.4.2-150200.11.76.1
libswresample-devel - update to 3.4.2-150200.11.76.1
ffmpeg-debugsource - update to 3.4.2-150200.11.76.1
libavutil-devel - update to 3.4.2-150200.11.76.1
libpostproc54-debuginfo - update to 3.4.2-150200.11.76.1
libavresample3-debuginfo - update to 3.4.2-150200.11.76.1
libpostproc-devel - update to 3.4.2-150200.11.76.1
libavresample3 - update to 3.4.2-150200.11.76.1
libswscale-devel - update to 3.4.2-150200.11.76.1
ffmpeg (Debian package) - update to 7:7.1.5-0+deb13u1

• https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23159
• https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/b8f8dac0cf49918c19f5612c9d2bd4461a6efd99

• Remote code execution in FFmpeg
• Debian update for ffmpeg
• SUSE update for ffmpeg