5.3

CVSS Score

3.1

-

CVSS Score

Basic Information

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CVE-2026-25983

CVE-2026-25983: ImageMagick has Use After Free in MSLStartElement in "coders/msl.c"

ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 7.1.2-15 and 6.9.13-40, 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. Versions 7.1.2-15 and 6.9.13-40 contain a patch.

(GitHub Advisory)

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CVE-2026-25983

CVE-2026-25983:

5.3

CVSS Score

3.1

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
Magick.NET-Q16-AnyCPU	nuget	< 14.10.3	14.10.3
Magick.NET-Q16-HDRI-AnyCPU	nuget	< 14.10.3	14.10.3
Magick.NET-Q16-HDRI-OpenMP-arm64	nuget	< 14.10.3	14.10.3
Magick.NET-Q16-HDRI-OpenMP-x64	nuget	< 14.10.3	14.10.3
Magick.NET-Q16-HDRI-arm64	nuget	< 14.10.3	14.10.3
Magick.NET-Q16-HDRI-x64	nuget	< 14.10.3	14.10.3
Magick.NET-Q16-HDRI-x86	nuget	< 14.10.3	14.10.3
Magick.NET-Q16-OpenMP-arm64	nuget	< 14.10.3	14.10.3
Magick.NET-Q16-OpenMP-x64	nuget	< 14.10.3	14.10.3
Magick.NET-Q16-OpenMP-x86	nuget	< 14.10.3	14.10.3
Magick.NET-Q16-arm64	nuget	< 14.10.3	14.10.3
Magick.NET-Q16-x64	nuget	< 14.10.3	14.10.3
Magick.NET-Q16-x86	nuget	< 14.10.3	14.10.3
Magick.NET-Q8-AnyCPU	nuget	< 14.10.3	14.10.3
Magick.NET-Q8-OpenMP-arm64	nuget	< 14.10.3	14.10.3
Magick.NET-Q8-OpenMP-x64	nuget	< 14.10.3	14.10.3
Magick.NET-Q8-arm64	nuget	< 14.10.3	14.10.3
Magick.NET-Q8-x64	nuget	< 14.10.3	14.10.3
Magick.NET-Q8-x86	nuget	< 14.10.3	14.10.3

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability is a use-after-free within the MSL image format handler in ImageMagick. The analysis of the patch 257200cb21de23404dce5f8261871845d425dee5 confirms this. The patch is located in the file coders/msl.c and specifically targets the function MSLStartElement. The change consists of moving the initialization of variables that access the msl_info->image[n] pointer to after the null check for this pointer. This indicates that previously, the pointer was dereferenced before validation, which could lead to a use-after-free if a preceding operation in the MSL script had already deallocated the image. The vulnerable function is therefore MSLStartElement, as it contains the flawed logic that accesses the potentially freed memory.

Vulnerable functions

MSLStartElement

coders/msl.c

The function `MSLStartElement` in `coders/msl.c` is vulnerable to a use-after-free. When parsing a crafted MSL file, the code would access attributes of an image object (`msl_info->image[n]`) before checking if the object was NULL. A malicious MSL script could contain an operation that frees the image, causing subsequent operations within the same `MSLStartElement` call to access freed memory, leading to a crash or other undefined behavior. The patch fixes this by moving the NULL check before the memory access.

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WAF Rule

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Reasoning

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