ImageSharp 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.
Fix
Patch, vendor advisory and mitigation references on NVD 4
- https://github.com/SixLabors/ImageSharp/commit/b03f0ed7e5be760eecc740fa53dd166b18ae9b23 Patch
- https://github.com/SixLabors/ImageSharp/pull/3187 Issue Tracking, Patch
- https://github.com/SixLabors/ImageSharp/security/advisories/GHSA-ffp7-56pq-64mr Exploit, Vendor Advisory
- https://github.com/SixLabors/ImageSharp/security/advisories/GHSA-ffp7-56pq-64mr Exploit, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 7.5 · sixlaborsNVD modified 2026-10-24 01:36
Affected (CPE criteria) 1
cpe:2.3:a:sixlabors:imagesharp:*:*:*:*:*:*:*:*
References 5
- https://github.com/SixLabors/ImageSharp/commit/b03f0ed7e5be760eecc740fa53dd166b18ae9b23 Patch
- https://github.com/SixLabors/ImageSharp/pull/3187 Issue Tracking, Patch
- https://github.com/SixLabors/ImageSharp/releases/tag/v4.1.2 Release Notes
- https://github.com/SixLabors/ImageSharp/security/advisories/GHSA-ffp7-56pq-64mr Exploit, Vendor Advisory
- https://github.com/SixLabors/ImageSharp/security/advisories/GHSA-ffp7-56pq-64mr Exploit, Vendor Advisory