ImageMagick has Global Buffer Overflow (OOB Read) via Negative Pixel Index in UIL and XPM Writer
The UIL and XPM image encoder do not validate the pixel index value returned by GetPixelIndex() before using it as an array subscript. In HDRI builds, Quantum is a floating-point type, so pixel index values can be negative. An attacker can craft an image with negative pixel index values to trigger a global buffer overflow read during conversion, leading to information disclosure or a process crash.
READ of size 1 at 0x55a8823a776e thread T0
#0 0x55a880d01e85 in WriteUILImage coders/uil.c:355READ of size 1 at 0x55fa1c04c66e thread T0
#0 0x55fa1a9ee415 in WriteXPMImage coders/xpm.c:1135Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| .NET (NuGet) | Magick.NET-Q16-AnyCPU | < 14.10.3 | 14.10.3 |
| .NET (NuGet) | Magick.NET-Q16-arm64 | < 14.10.3 | 14.10.3 |
| .NET (NuGet) | Magick.NET-Q16-HDRI-AnyCPU | < 14.10.3 | 14.10.3 |
| .NET (NuGet) | Magick.NET-Q16-HDRI-arm64 | < 14.10.3 | 14.10.3 |
| .NET (NuGet) | Magick.NET-Q16-HDRI-OpenMP-arm64 | < 14.10.3 | 14.10.3 |
| .NET (NuGet) | Magick.NET-Q16-HDRI-OpenMP-x64 | < 14.10.3 | 14.10.3 |
| .NET (NuGet) | Magick.NET-Q16-HDRI-x64 | < 14.10.3 | 14.10.3 |
| .NET (NuGet) | Magick.NET-Q16-OpenMP-arm64 | < 14.10.3 | 14.10.3 |
| .NET (NuGet) | Magick.NET-Q16-OpenMP-x64 | < 14.10.3 | 14.10.3 |
| .NET (NuGet) | Magick.NET-Q16-OpenMP-x86 | < 14.10.3 | 14.10.3 |
| .NET (NuGet) | Magick.NET-Q16-x64 | < 14.10.3 | 14.10.3 |
| .NET (NuGet) | Magick.NET-Q16-x86 | < 14.10.3 | 14.10.3 |
| .NET (NuGet) | Magick.NET-Q8-AnyCPU | < 14.10.3 | 14.10.3 |
| .NET (NuGet) | Magick.NET-Q8-arm64 | < 14.10.3 | 14.10.3 |
| .NET (NuGet) | Magick.NET-Q8-OpenMP-arm64 | < 14.10.3 | 14.10.3 |
| .NET (NuGet) | Magick.NET-Q8-OpenMP-x64 | < 14.10.3 | 14.10.3 |
| .NET (NuGet) | Magick.NET-Q8-x86 | < 14.10.3 | 14.10.3 |
References
- https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-vpxv-r9pg-7gpr
- https://nvd.nist.gov/vuln/detail/CVE-2026-25898
- https://github.com/ImageMagick/ImageMagick/commit/c9c87dbaba56bf82aebd3392e11f0ffd93709b12
- https://github.com/ImageMagick/ImageMagick
- https://github.com/dlemstra/Magick.NET/releases/tag/14.10.3
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L- Weakness (CWE)
CWE-125- Platform
- .NET (NuGet)
- Package
Magick.NET-Q16-AnyCPU, Magick.NET-Q16-arm64, Magick.NET-Q16-HDRI-AnyCPU- Disclosed
- 24.02.2026
- Updated
- 11.10.2026 11:23
Sources and licenses
OSV / GitHub Advisory Database - GHSA-vpxv-r9pg-7gpr - CC BY 4.0
Vulnerability history: Magick.NET-Q16-HDRI-arm64
All published vulnerabilities of this package (.NET (NuGet)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 159
- First → latest
- 07.2025 09.2026
- Without a fix
- 1
- Exploited in attacks
- 0
Severity breakdown
- High 24
- Medium 95
- Low 40
Disclosures per year
- 2025: 14
- 2026: 145
-
ImageMagick has Global Buffer Overflow (OOB Read) via Negative Pixel Index in UIL and XPM Writer this entry
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