CVE-2026-66758 – Gimp: integer overflow in file-fits plugin causes a heap-based buffer overflow on crafted fits images

CVE ID :CVE-2026-66758

Published : 27. Juli 2026 19:17 | 38 Minuten ago

Description :A flaw was found in the file-fits plugin in GIMP. When processing a FITS image file, the plugin calculates memory allocation sizes using signed 32-bit integers for width and height. If a crafted file sets both values to large values, their product exceeds 2^31 and overflows, resulting in an undersized heap-based buffer allocation. This integer overflow issue results in a heap-based buffer overflow when cfitsio subsequently writes a full row of pixels in the buffer, causing memory corruption, potentially leading to arbitrary code execution or a denial of service.

Severity: 7.8 | HIGH

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