CVE-2026-35444: Libsdl Sdl Image

Medium severity, CVSS 6.1. EPSS: 0.3% chance of exploitation in the next 30 days.

SDL_image is a library to load images of various formats as SDL surfaces. In do_layer_surface() in src/IMG_xcf.c, pixel index values from decoded XCF tile data are used directly as colormap indices without validating them against the colormap size (cm_num). A crafted .xcf file with a small colormap and out-of-range pixel indices causes heap out-of-bounds reads of up to 762 bytes past the colormap allocation. Both IMAGE_INDEXED code paths are affected (bpp=1 and bpp=2). The leaked heap bytes are written into the output surface pixel data, making them potentially observable in the rendered image. This vulnerability is fixed with commit 996bf12888925932daace576e09c3053410896f8.

Affected products

• Libsdl Sdl Image: before 2026-04-02 (fixed in 2026-04-02)

Published 2026-04-06. Last modified 2026-07-24.