CVE-2026-25898

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, the UIL and XPM image encoders do not validate the pixel index value returned by `GetPixelIndex()` before using it as an array subscript. In HDRI builds, `Quantum` is a floating-point type, which allows pixel index values to be negative. An attacker could craft an image with negative pixel index values to trigger a global buffer overflow read during conversion, potentially leading to information disclosure or a process crash. Versions 7.1.2-15 and 6.9.13-40 include a patch that addresses this issue.

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