ImageMagick has memory leak of watermark Image object in ReadSTEGANOImage on multiple error/early-return paths
Summary
In ReadSTEGANOImage() (coders/stegano.c), the watermark Image object is not freed on three early-return paths, resulting in a definite memory leak (~13.5KB+ per invocation) that can be exploited for denial of service.
Direct leak of 13512 byte(s) in 1 object(s) allocated from:
#0 0x7f5c11e27887 in __interceptor_malloc ../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:145
#1 0x55cdc38f65c4 in AcquireMagickMemory MagickCore/memory.c:536
#2 0x55cdc38f65eb in AcquireCriticalMemory MagickCore/memory.c:612
#3 0x55cdc3899e91 in AcquireImage MagickCore/image.c:154Affected 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-HDRI-x86 | < 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-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-g2pr-qxjg-7r2w
- https://nvd.nist.gov/vuln/detail/CVE-2026-25796
- https://github.com/ImageMagick/ImageMagick/commit/93ad259ce4f6d641eea0bee73f374af90f35efc3
- 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:N/I:N/A:L- Weakness (CWE)
CWE-401- 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-g2pr-qxjg-7r2w - 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 memory leak of watermark Image object in ReadSTEGANOImage on multiple error/early-return paths this entry
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