CVE-2026-25983: Magick.NET Q8 OpenMP x64 ImageMagick Has Use After Free Vulnerability

MODERATE
Advisory Identifier: GHSA-fwqw-2x5x-w566
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CVSS 5.3
CWE-416
Published
Advisory Summary

CVE-2026-25983 is a MODERATE (CVSS 5.3) imagemagick has use after free vulnerability (CWE-416: Use After Free) affecting Magick.NET Q8 OpenMP x64 libraries in the NuGet ecosystem. The issue involves imagemagick has use after free in mslstartelement in "coders/msl.c". Remediation is available by upgrading affected packages to version 14.10.3.

CVE-2026-25983 at a Glance

CVE Identifier CVE-2026-25983
GHSA Identifier GHSA-fwqw-2x5x-w566
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-416: Use After Free
Affected Product Magick.NET Q8 OpenMP x64
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-2026-25983

To remediate this vulnerability, upgrade all affected Magick.NET Q8 OpenMP x64 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-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
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-x64 fixed: 14.10.3 
Upgrade Magick.NET-Q16-x64 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
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-Q8-OpenMP-x64

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-25983, inspect your project dependencies for Magick.NET Q8 OpenMP x64:

inspect dependencies for Magick.NET-Q8-OpenMP-x64

Analyze the terminal output to locate any version of Magick.NET Q8 OpenMP x64 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-416: Use After Free, where the product reuses or references memory after it has been freed. at some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer. In Magick.NET Q8 OpenMP x64, 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

A crafted MSL script triggers a heap-use-after-free. The operation element handler replaces and frees the image while the parser continues reading from it, leading to a UAF in ReadBlobString during further parsing.

CVE-2026-25983 Affected Magick.NET Q8 OpenMP x64 Versions

19 component(s)
Fixed Versions:
14.10.3
Product / Package Ecosystem Affected Versions Fixed Version
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
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-x64
nuget/Magick.NET-Q16-x64
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

References

Magick.NET Q8 OpenMP x64 Source Repository REPOSITORY
https://github.com/ImageMagick/ImageMagick
Magick.NET Q8 OpenMP x64 Release RELEASE
https://github.com/dlemstra/Magick.NET/releases/tag/14.10.3
GitHub Advisory / Wiki ADVISORY
https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-fwqw-2x5x-w566
NVD — CVE-2026-25983 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-25983
Security Fix Commit FIX COMMIT
https://github.com/ImageMagick/ImageMagick/commit/257200cb21de23404dce5f8261871845d425dee5

Frequently Asked Questions

What is CVE-2026-25983?
CVE-2026-25983 is a security vulnerability in Magick.NET Q8 OpenMP x64 involving ImageMagick has Use After Free in MSLStartElement in "coders/msl.c" under CWE-416: Use After Free.
Which Magick.NET Q8 OpenMP x64 versions are affected?
Affected versions include releases prior to 14.10.3 across affected packages: Magick.NET-Q8-OpenMP-x64, Magick.NET-Q8-arm64, Magick.NET-Q8-x64, Magick.NET-Q8-x86, 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-x64, Magick.NET-Q16-x86, Magick.NET-Q8-AnyCPU, Magick.NET-Q8-OpenMP-arm64.
What version fixes CVE-2026-25983?
Upgrading to 14.10.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is Magick.NET-Q8-OpenMP-x64 affected?
Yes, Magick.NET-Q8-OpenMP-x64 is affected in releases prior to 14.10.3. Upgrade your dependency to 14.10.3 or later.
Is Magick.NET-Q8-arm64 affected?
Yes, Magick.NET-Q8-arm64 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-2026-25983?
CVE-2026-25983 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-2026-25983?
CVE-2026-25983 is classified under CWE-416: Use After Free (The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.).
How can I check NuGet dependencies for CVE-2026-25983?
Run the dependency tree command: 'inspect dependencies for Magick.NET-Q8-OpenMP-x64'. 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 
{
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  "id" : "GHSA-fwqw-2x5x-w566",
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  "published" : "2026-02-24T15:43:54Z",
  "aliases" : [ "CVE-2026-25983" ],
  "summary" : "ImageMagick has Use After Free in MSLStartElement in \"coders/msl.c\"",
  "details" : "A crafted MSL script triggers a heap-use-after-free. The operation element handler replaces and frees the image while the parser continues reading from it, leading to a UAF in ReadBlobString during further parsing.",
  "severity" : [ {
    "type" : "CVSS_V3",
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      "type" : "ECOSYSTEM",
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  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-fwqw-2x5x-w566"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-25983"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ImageMagick/ImageMagick/commit/257200cb21de23404dce5f8261871845d425dee5"
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    "github_reviewed_at" : "2026-02-24T15:43:54Z",
    "nvd_published_at" : "2026-02-24T02:16:02Z"
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}