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

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

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.

Source published

27 Jul 2026 19:07:12 UTC

Source modified

2 Nov 2026 09:58:56 UTC

Saved here

2 Nov 2026 10:57:17 UTC

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CVSS 3.1 · 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H