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High severityNVD Advisory· Published Aug 26, 2025· Updated Feb 26, 2026

ImageMagick (WriteBMPImage): 32-bit integer overflow when writing BMP scanline stride → heap buffer overflow

CVE-2025-57803

Description

ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 6.9.13-28 and 7.1.2-2 for ImageMagick's 32-bit build, a 32-bit integer overflow in the BMP encoder’s scanline-stride computation collapses bytes_per_line (stride) to a tiny value while the per-row writer still emits 3 × width bytes for 24-bpp images. The row base pointer advances using the (overflowed) stride, so the first row immediately writes past its slot and into adjacent heap memory with attacker-controlled bytes. This is a classic, powerful primitive for heap corruption in common auto-convert pipelines. This issue has been patched in versions 6.9.13-28 and 7.1.2-2.

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
Magick.NET-Q16-AnyCPUNuGet
< 14.8.114.8.1
Magick.NET-Q16-HDRI-AnyCPUNuGet
< 14.8.114.8.1
Magick.NET-Q16-HDRI-x86NuGet
< 14.8.114.8.1
Magick.NET-Q16-x86NuGet
< 14.8.114.8.1
Magick.NET-Q8-AnyCPUNuGet
< 14.8.114.8.1
Magick.NET-Q8-x86NuGet
< 14.8.114.8.1

Affected products

30

Patches

Vulnerability mechanics

References

6

News mentions

0

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