ImageSharp: ICC LUT16 output channel count can write beyond Vector4

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-106112
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-06 18:16:52 UTC
Updated2026-10-06 20:03:40 UTC
DescriptionImageSharp is a 2D graphics library. From 4.0.0 until 4.1.2, ICC LUT16 conversion accepts more than four output channels even though ClutCalculator.Calculate and LutEntryCalculator.CalculateLut store intermediate and output values in Vector4. When DecoderOptions.ColorProfileHandling is set to Convert, a malformed embedded profile can direct interpolation and output-LUT operations to write one float per declared channel beyond the four-float destination. This can corrupt memory and terminate the process; the default Preserve mode does not run ICC conversion. This issue is fixed in version 4.1.2.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

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

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

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA SixLabors ImageSharp affected >= 4.0.0, < 4.1.2 Not specified

References

ReferenceSourceLinkTags
github.com/SixLabors/ImageSharp/security/advisories/GHSA-ffp7-56pq-64mr 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/SixLabors/ImageSharp/pull/3187 [email protected] github.com
github.com/SixLabors/ImageSharp/releases/tag/v4.1.2 [email protected] github.com
github.com/SixLabors/ImageSharp/commit/b03f0ed7e5be760eecc740fa53dd166b1... [email protected] github.com
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