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GHSA-g2pr-qxjg-7r2w

ImageMagick has memory leak of watermark Image object in ReadSTEGANOImage on multiple error/early-return paths

Source: GitHub Advisory Database (reviewed) Moderate CVE-2026-25796

Packages

EcosystemPackageAffectedFixed in
NuGet Magick.NET-Q16-AnyCPU < 14.10.3 14.10.3
NuGet Magick.NET-Q16-HDRI-AnyCPU < 14.10.3 14.10.3
NuGet Magick.NET-Q16-HDRI-OpenMP-arm64 < 14.10.3 14.10.3
NuGet Magick.NET-Q16-HDRI-OpenMP-x64 < 14.10.3 14.10.3
NuGet Magick.NET-Q16-HDRI-arm64 < 14.10.3 14.10.3
NuGet Magick.NET-Q16-HDRI-x64 < 14.10.3 14.10.3
NuGet Magick.NET-Q16-HDRI-x86 < 14.10.3 14.10.3
NuGet Magick.NET-Q16-OpenMP-arm64 < 14.10.3 14.10.3
NuGet Magick.NET-Q16-OpenMP-x64 < 14.10.3 14.10.3
NuGet Magick.NET-Q16-OpenMP-x86 < 14.10.3 14.10.3
NuGet Magick.NET-Q16-arm64 < 14.10.3 14.10.3
NuGet Magick.NET-Q16-x64 < 14.10.3 14.10.3
NuGet Magick.NET-Q16-x86 < 14.10.3 14.10.3
NuGet Magick.NET-Q8-AnyCPU < 14.10.3 14.10.3
NuGet Magick.NET-Q8-OpenMP-arm64 < 14.10.3 14.10.3
NuGet Magick.NET-Q8-arm64 < 14.10.3 14.10.3
NuGet Magick.NET-Q8-x64 < 14.10.3 14.10.3
NuGet Magick.NET-Q8-x86 < 14.10.3 14.10.3

Details

As written in the advisory (Markdown source, shown as plain text).

### 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:154 ```

References

External links from the advisory. They lead to third-party sites.