ImageMagick: Possible memory leak in ASHLAR encoder
A memory leak in the ASHLAR image writer allows an attacker to exhaust process memory by providing a crafted image that results in small objects that are allocated but never freed.
==880062== Memcheck, a memory error detector
==880062== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==880062== Using Valgrind-3.18.1 and LibVEX; rerun with -h for copyright info
==880062==
==880062==
==880062== HEAP SUMMARY:
==880062== in use at exit: 386,826 bytes in 696 blocks
==880062== total heap usage: 30,523 allocs, 29,827 frees, 21,803,756 bytes allocated
==880062==
==880062== LEAK SUMMARY:
==880062== definitely lost: 3,408 bytes in 3 blocks
==880062== indirectly lost: 88,885 bytes in 30 blocks
==880062== possibly lost: 140,944 bytes in 383 blocks
==880062== still reachable: 151,573 bytes in 259 blocks
==880062== suppressed: 0 bytes in 0 blocks
==880062== Reachable blocks (those to which a pointer was found) are not shown.
==880062== To see them, rerun with: --leak-check=full --show-leak-kinds=all
==880062==
==880062== For lists of detected and suppressed errors, rerun with: -s
==880062== ERROR SUMMARY: 2 errors from 2 contexts (suppressed: 0 from 0)Affected 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-OpenMP-x64 | < 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-gm37-qx7w-p258
- https://nvd.nist.gov/vuln/detail/CVE-2026-25637
- https://github.com/ImageMagick/ImageMagick/commit/30ce0e8efbd72fd6b50ed3a10ae22f57c8901137
- 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-gm37-qx7w-p258 - CC BY 4.0
Vulnerability history: Magick.NET-Q16-HDRI-OpenMP-x64
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
- 95
- First → latest
- 07.2025 05.2026
- Without a fix
- 1
- Exploited in attacks
- 0
Severity breakdown
- High 19
- Medium 59
- Low 17
Disclosures per year
- 2025: 14
- 2026: 81
-
ImageMagick: Possible memory leak in ASHLAR encoder this entry
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