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

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Summary

CVECVE-2026-8461
StatePUBLISHED
AssignerJFROG
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-18 14:17:36 UTC
Updated2026-06-22 20:31:03 UTC
DescriptionAn 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.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS: 0.003460000 probability, percentile 0.262320000 (date 2026-06-22)

Problem Types: CWE-787 | CWE-787 CWE-787 Out-of-bounds write

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary8.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
3.1CNACVSS8.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA FFmpeg FFmpeg affected 8.1.2 custom Not specified

References

ReferenceSourceLinkTags
code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23159 [email protected] code.ffmpeg.org
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