CVE-2026-25969: Magick.NET Q16 AnyCPU Image Magick Has A Memory Vulnerability

MODERATE
Advisory Identifier: GHSA-xgm3-v4r9-wfgm
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CVSS 5.3
CWE-401
Published
Advisory Summary

CVE-2026-25969 is a MODERATE (CVSS 5.3) image magick has a memory vulnerability (CWE-401: Missing Release of Memory after Effective Lifetime) affecting Magick.NET Q16 AnyCPU libraries in the NuGet ecosystem. The issue involves image magick has a memory leak in coders/ashlar.c. Remediation is available by upgrading affected packages to version 14.10.3.

CVE-2026-25969 at a Glance

CVE Identifier CVE-2026-25969
GHSA Identifier GHSA-xgm3-v4r9-wfgm
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-401: Missing Release of Memory after Effective Lifetime
Affected Product Magick.NET Q16 AnyCPU
Package Ecosystem NuGet
Published Date
Last Updated

Security Impact

CVSS: 5.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability Low (A:L)

How to Fix CVE-2026-25969

To remediate this vulnerability, upgrade all affected Magick.NET Q16 AnyCPU dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Magick.NET-Q16-AnyCPU fixed: 14.10.3 
Upgrade Magick.NET-Q16-AnyCPU to 14.10.3
Magick.NET-Q16-HDRI-AnyCPU fixed: 14.10.3 
Upgrade Magick.NET-Q16-HDRI-AnyCPU to 14.10.3
Magick.NET-Q16-HDRI-OpenMP-arm64 fixed: 14.10.3 
Upgrade Magick.NET-Q16-HDRI-OpenMP-arm64 to 14.10.3
Magick.NET-Q16-HDRI-OpenMP-x64 fixed: 14.10.3 
Upgrade Magick.NET-Q16-HDRI-OpenMP-x64 to 14.10.3
Magick.NET-Q16-HDRI-arm64 fixed: 14.10.3 
Upgrade Magick.NET-Q16-HDRI-arm64 to 14.10.3
Magick.NET-Q16-HDRI-x64 fixed: 14.10.3 
Upgrade Magick.NET-Q16-HDRI-x64 to 14.10.3
Magick.NET-Q16-HDRI-x86 fixed: 14.10.3 
Upgrade Magick.NET-Q16-HDRI-x86 to 14.10.3
Magick.NET-Q16-OpenMP-arm64 fixed: 14.10.3 
Upgrade Magick.NET-Q16-OpenMP-arm64 to 14.10.3
Magick.NET-Q16-OpenMP-x64 fixed: 14.10.3 
Upgrade Magick.NET-Q16-OpenMP-x64 to 14.10.3
Magick.NET-Q16-OpenMP-x86 fixed: 14.10.3 
Upgrade Magick.NET-Q16-OpenMP-x86 to 14.10.3
Magick.NET-Q16-arm64 fixed: 14.10.3 
Upgrade Magick.NET-Q16-arm64 to 14.10.3
Magick.NET-Q16-x86 fixed: 14.10.3 
Upgrade Magick.NET-Q16-x86 to 14.10.3
Magick.NET-Q8-AnyCPU fixed: 14.10.3 
Upgrade Magick.NET-Q8-AnyCPU to 14.10.3
Magick.NET-Q8-OpenMP-arm64 fixed: 14.10.3 
Upgrade Magick.NET-Q8-OpenMP-arm64 to 14.10.3
Magick.NET-Q8-OpenMP-x64 fixed: 14.10.3 
Upgrade Magick.NET-Q8-OpenMP-x64 to 14.10.3
Magick.NET-Q8-arm64 fixed: 14.10.3 
Upgrade Magick.NET-Q8-arm64 to 14.10.3
Magick.NET-Q8-x64 fixed: 14.10.3 
Upgrade Magick.NET-Q8-x64 to 14.10.3
Magick.NET-Q8-x86 fixed: 14.10.3 
Upgrade Magick.NET-Q8-x86 to 14.10.3
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for Magick.NET-Q16-AnyCPU

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-25969, inspect your project dependencies for Magick.NET Q16 AnyCPU:

inspect dependencies for Magick.NET-Q16-AnyCPU

Analyze the terminal output to locate any version of Magick.NET Q16 AnyCPU in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 14.10.3), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-401: Missing Release of Memory after Effective Lifetime, where the product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse. In Magick.NET Q16 AnyCPU, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

Memory leak exists in `coders/ashlar.c`. The `WriteASHLARImage` allocates a structure. However, when an exception is thrown, the allocated memory is not properly released, resulting in a potential memory leak. ``` ```bash ==78968== Memcheck, a memory error detector ==78968== Copyright (C) 2002-2022, and GNU GPL'd, by Julian Seward et al. ==78968== Using Valgrind-3.22.0 and LibVEX; rerun with -h for copyright info ==78968== ==78968== HEAP SUMMARY: ==78968== in use at exit: 17,232 bytes in 4 blocks ==78968== total heap usage: 4,781 allocs, 4,777 frees, 785,472 bytes allocated ```

CVE-2026-25969 Affected Magick.NET Q16 AnyCPU Versions

18 component(s)
Fixed Versions:
14.10.3
Product / Package Ecosystem Affected Versions Fixed Version
Magick.NET-Q16-AnyCPU
nuget/Magick.NET-Q16-AnyCPU
NuGet
< 14.10.3
14.10.3
Magick.NET-Q16-HDRI-AnyCPU
nuget/Magick.NET-Q16-HDRI-AnyCPU
NuGet
< 14.10.3
14.10.3
Magick.NET-Q16-HDRI-OpenMP-arm64
nuget/Magick.NET-Q16-HDRI-OpenMP-arm64
NuGet
< 14.10.3
14.10.3
Magick.NET-Q16-HDRI-OpenMP-x64
nuget/Magick.NET-Q16-HDRI-OpenMP-x64
NuGet
< 14.10.3
14.10.3
Magick.NET-Q16-HDRI-arm64
nuget/Magick.NET-Q16-HDRI-arm64
NuGet
< 14.10.3
14.10.3
Magick.NET-Q16-HDRI-x64
nuget/Magick.NET-Q16-HDRI-x64
NuGet
< 14.10.3
14.10.3
Magick.NET-Q16-HDRI-x86
nuget/Magick.NET-Q16-HDRI-x86
NuGet
< 14.10.3
14.10.3
Magick.NET-Q16-OpenMP-arm64
nuget/Magick.NET-Q16-OpenMP-arm64
NuGet
< 14.10.3
14.10.3
Magick.NET-Q16-OpenMP-x64
nuget/Magick.NET-Q16-OpenMP-x64
NuGet
< 14.10.3
14.10.3
Magick.NET-Q16-OpenMP-x86
nuget/Magick.NET-Q16-OpenMP-x86
NuGet
< 14.10.3
14.10.3
Magick.NET-Q16-arm64
nuget/Magick.NET-Q16-arm64
NuGet
< 14.10.3
14.10.3
Magick.NET-Q16-x86
nuget/Magick.NET-Q16-x86
NuGet
< 14.10.3
14.10.3
Magick.NET-Q8-AnyCPU
nuget/Magick.NET-Q8-AnyCPU
NuGet
< 14.10.3
14.10.3
Magick.NET-Q8-OpenMP-arm64
nuget/Magick.NET-Q8-OpenMP-arm64
NuGet
< 14.10.3
14.10.3
Magick.NET-Q8-OpenMP-x64
nuget/Magick.NET-Q8-OpenMP-x64
NuGet
< 14.10.3
14.10.3
Magick.NET-Q8-arm64
nuget/Magick.NET-Q8-arm64
NuGet
< 14.10.3
14.10.3
Magick.NET-Q8-x64
nuget/Magick.NET-Q8-x64
NuGet
< 14.10.3
14.10.3
Magick.NET-Q8-x86
nuget/Magick.NET-Q8-x86
NuGet
< 14.10.3
14.10.3

References

GitHub Advisory / Wiki ADVISORY
https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-xgm3-v4r9-wfgm
NVD — CVE-2026-25969 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-25969
Security Fix Commit FIX COMMIT
https://github.com/ImageMagick/ImageMagick/commit/a253d1b124ebdcc2832daac6f9a35c362635b40e
Magick.NET Q16 AnyCPU Source Repository REPOSITORY
https://github.com/ImageMagick/ImageMagick
Magick.NET Q16 AnyCPU Release RELEASE
https://github.com/dlemstra/Magick.NET/releases/tag/14.10.3

Frequently Asked Questions

What is CVE-2026-25969?
CVE-2026-25969 is a security vulnerability in Magick.NET Q16 AnyCPU involving Image Magick has a Memory Leak in coders/ashlar.c under CWE-401: Missing Release of Memory after Effective Lifetime.
Which Magick.NET Q16 AnyCPU versions are affected?
Affected versions include releases prior to 14.10.3 across affected packages: Magick.NET-Q16-AnyCPU, Magick.NET-Q16-HDRI-AnyCPU, Magick.NET-Q16-HDRI-OpenMP-arm64, Magick.NET-Q16-HDRI-OpenMP-x64, Magick.NET-Q16-HDRI-arm64, Magick.NET-Q16-HDRI-x64, Magick.NET-Q16-HDRI-x86, Magick.NET-Q16-OpenMP-arm64, Magick.NET-Q16-OpenMP-x64, Magick.NET-Q16-OpenMP-x86, Magick.NET-Q16-arm64, Magick.NET-Q16-x86, Magick.NET-Q8-AnyCPU, Magick.NET-Q8-OpenMP-arm64, Magick.NET-Q8-OpenMP-x64, Magick.NET-Q8-arm64, Magick.NET-Q8-x64, Magick.NET-Q8-x86.
What version fixes CVE-2026-25969?
Upgrading to 14.10.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is Magick.NET-Q16-AnyCPU affected?
Yes, Magick.NET-Q16-AnyCPU is affected in releases prior to 14.10.3. Upgrade your dependency to 14.10.3 or later.
Is Magick.NET-Q16-HDRI-AnyCPU affected?
Yes, Magick.NET-Q16-HDRI-AnyCPU is affected in releases prior to 14.10.3. Upgrade your dependency to 14.10.3 or later.
What is the CVSS score of CVE-2026-25969?
CVE-2026-25969 has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
What CWE is associated with CVE-2026-25969?
CVE-2026-25969 is classified under CWE-401: Missing Release of Memory after Effective Lifetime (The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.).
How can I check NuGet dependencies for CVE-2026-25969?
Run the dependency tree command: 'inspect dependencies for Magick.NET-Q16-AnyCPU'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-xgm3-v4r9-wfgm",
  "modified" : "2026-02-24T15:43:28Z",
  "published" : "2026-02-24T15:43:28Z",
  "aliases" : [ "CVE-2026-25969" ],
  "summary" : "Image Magick has a Memory Leak in coders/ashlar.c",
  "details" : "Memory leak exists in `coders/ashlar.c`. The `WriteASHLARImage` allocates a structure.  However, when an exception is thrown, the allocated memory is not properly released, resulting in a potential memory leak.\n\n```\n```bash\n==78968== Memcheck, a memory error detector\n==78968== Copyright (C) 2002-2022, and GNU GPL'd, by Julian Seward et al.\n==78968== Using Valgrind-3.22.0 and LibVEX; rerun with -h for copyright info\n==78968== \n==78968== HEAP SUMMARY:\n==78968==     in use at exit: 17,232 bytes in 4 blocks\n==78968==   total heap usage: 4,781 allocs, 4,777 frees, 785,472 bytes allocated\n```",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Magick.NET-Q16-AnyCPU"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
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    },
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    "package" : {
      "ecosystem" : "NuGet",
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    },
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      "ecosystem" : "NuGet",
      "name" : "Magick.NET-Q16-OpenMP-x64"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
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      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Magick.NET-Q16-OpenMP-x86"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
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    "package" : {
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    },
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    },
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    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Magick.NET-Q8-AnyCPU"
    },
    "ranges" : [ {
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      "name" : "Magick.NET-Q8-arm64"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "14.10.3"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Magick.NET-Q8-x64"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "14.10.3"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Magick.NET-Q8-x86"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "14.10.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-xgm3-v4r9-wfgm"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-25969"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ImageMagick/ImageMagick/commit/a253d1b124ebdcc2832daac6f9a35c362635b40e"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/ImageMagick/ImageMagick"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/dlemstra/Magick.NET/releases/tag/14.10.3"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-401" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-02-24T15:43:28Z",
    "nvd_published_at" : "2026-02-24T02:16:01Z"
  }
}