CVE-2025-57803: ImageMagick

High severity, CVSS 8.8. EPSS: 0.8% chance of exploitation in the next 30 days.

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.

Affected products

• ImageMagick ImageMagick: before 6.9.13-28 (fixed in 6.9.13-28); from 7.0.0-0, before 7.1.2-2 (fixed in 7.1.2-2)

Published 2025-08-26. Last modified 2026-06-17.