Heap out-of-bounds write via odd slice_height in FFmpeg MagicYUV decoder
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 3 fixed, 3 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-787 and the CVSS impact.
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
- Fix · CNA FFmpeg (FFmpeg) Fixed in 8.1.2
Red Hat 12 advisories
- RHSA-2026:82923 Released 2026-10-14 · Red Hat rating ImportantRed Hat AI Base Images 3.2.5 (ROCm 7.0)
- Red Hat OpenShift AI 3.2 registry.redhat.io/rhai/base-image-rocm-rhel9
- RHSA-2026:82921 Released 2026-10-14 · Red Hat rating ImportantRed Hat AI Base Images 3.2.5 (CUDA 12.9)
- Red Hat OpenShift AI 3.2 registry.redhat.io/rhai/base-image-cuda-rhel9
- RHSA-2026:82759 Released 2026-10-14 · Red Hat rating ImportantRed Hat AI Base Images 3.2.5 (CPU)
- Red Hat OpenShift AI 3.2 registry.redhat.io/rhai/base-image-cpu-rhel9
Show 9 more Red Hat advisories
- RHSA-2026:82750 Released 2026-10-14 · Red Hat rating ImportantRed Hat AI Base Images 3.2.5 (Spyre)
- Red Hat OpenShift AI 3.2 registry.redhat.io/rhai/base-image-spyre-rhel9
- RHSA-2026:81128 Released 2026-10-12 · Red Hat rating ImportantRed Hat AI Base Images 3.2.4 (CPU)
- Red Hat OpenShift AI 3.2 registry.redhat.io/rhai/base-image-cpu-rhel9
- RHSA-2026:80760 Released 2026-10-12 · Red Hat rating ImportantRed Hat AI Base Images 3.2.4 (Spyre)
- Red Hat OpenShift AI 3.2 registry.redhat.io/rhai/base-image-spyre-rhel9
- RHSA-2026:80757 Released 2026-10-12 · Red Hat rating ImportantRed Hat AI Base Images 3.2.4 (ROCm 7.0)
- Red Hat OpenShift AI 3.2 registry.redhat.io/rhai/base-image-rocm-rhel9
- RHSA-2026:80739 Released 2026-10-12 · Red Hat rating ImportantRed Hat AI Base Images 3.2.4 (CUDA 12.9)
- Red Hat OpenShift AI 3.2 registry.redhat.io/rhai/base-image-cuda-rhel9
- RHSA-2026:80740 Released 2026-10-12 · Red Hat rating ImportantRed Hat AI Base Images 3.2.4 (ROCm 6.4)
- Red Hat OpenShift AI 3.2 registry.redhat.io/rhai/base-image-rocm-rhel9
- RHSA-2026:80735 Released 2026-10-12 · Red Hat rating ImportantRed Hat AI Base Images 3.2.4 (TPU)
- Red Hat OpenShift AI 3.2 registry.redhat.io/rhai/base-image-tpu-rhel9
- RHSA-2026:74089 Released 2026-09-30 · Red Hat rating ModerateRHEL AI 3.0 RPM runtime CVE fix - ffmpeg
- Red Hat Enterprise Linux AI 3.0 for RHEL 9 ffmpeg-6.1.6-9.el9ai, ffmpeg-free-rhai-6.1.6-9.el9ai, ffmpeg-free-rhai-devel-6.1.6-9.el9ai +16
- RHSA-2026:43711 Released 2026-07-22 · Red Hat rating ImportantRHEL AI 3.5 RPM runtime CVE fix - ffmpeg
- Red Hat Enterprise Linux AI 3.5 for RHEL 9 ffmpeg-6.1.6-1.el9ai, ffmpeg-free-rhai-6.1.6-1.el9ai, ffmpeg-free-rhai-devel-6.1.6-1.el9ai +16
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat AI Inference Server | Affected | No fix yet |
| Red Hat Enterprise Linux AI (RHEL AI) 3 | Affected | No fix yet |
| Red Hat OpenShift AI (RHOAI) | Affected | No fix yet |
| Red Hat Enterprise Linux AI 3.0 for RHEL 9 | Fixed | RHSA-2026:74089 |
| Red Hat Enterprise Linux AI 3.5 for RHEL 9 | Fixed | RHSA-2026:43711 |
| Red Hat OpenShift AI 3.2 | Fixed | RHSA-2026:80735, RHSA-2026:80739, RHSA-2026:80740, RHSA-2026:80757, RHSA-2026:80760, RHSA-2026:81128, RHSA-2026:82750, RHSA-2026:82759, RHSA-2026:82921, RHSA-2026:82923 |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-8461
- 2026-10-03 Alias added: GHSA-qff7-4q6c-m8h6
- 2026-10-13 Fix available: RHSA-2026:80735 · Red Hat
- 2026-10-13 Fix available: RHSA-2026:80739 · Red Hat
- 2026-10-13 Fix available: RHSA-2026:80740 · Red Hat
- 2026-10-13 Fix available: RHSA-2026:80757 · Red Hat
- 2026-10-13 Fix available: RHSA-2026:80760 · Red Hat
- 2026-10-13 Fix available: RHSA-2026:81128 · Red Hat
- 2026-10-13 Fix available: Red Hat OpenShift AI 3.2 · Red Hat
- 2026-10-15 Fix available: RHSA-2026:82750 · Red Hat
- 2026-10-15 Fix available: RHSA-2026:82921 · Red Hat
- 2026-10-15 Fix available: RHSA-2026:82923 · Red Hat
- 2026-10-15 Fix available: RHSA-2026:82759 · Red Hat
- 2026-10-16 Affected versions changed · Red Hat
References
More FFmpeg vulnerabilities
- TI-2025-19015 FFmpeg git-master before commit d5873b was discovered to contain a memory leak in the component libavutil/iamf.c. CVSS 3.1HIGH 8.8
- TI-2024-21238 FFmpeg 7.0 contains a heap-buffer-overflow at libavfilter/vf_tiltandshift.c:189:5 in copy_column. CVSS 3.1HIGH 8.4
- TI-2023-06050 Ffmpeg: null pointer dereference in ffmpeg hls parsing CVSS 3.1HIGH 7.5
- TI-2023-28420 Buffer Overflow vulnerability in Ffmpeg v.N113007-g8d24a28d06 allows a local attacker to… CVSS 3.1HIGH 8.0
- TI-2023-27357 FFmpeg v.n6.1-3-g466799d4f5 allows a heap-based buffer overflow via the… CVSS 3.1HIGH 8.0
- TI-2023-27044 Buffer Overflow vulnerability in FFmpeg version n6.1-3-g466799d4f5, allows a local… CVSS 3.1HIGH 8.0
Sources
- CVE-2026-8461 · CVE Program
- CVE-2026-8461 · NVD
- FIRST EPSS
- GHSA-qff7-4q6c-m8h6 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-8461 · Red Hat security data · CC BY 4.0
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