CVE-2026-35444

Name	CVE-2026-35444
Description	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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
libsdl2-image (PTS)	bullseye	2.0.5+dfsg1-2	vulnerable
	bookworm	2.6.3+dfsg-1	vulnerable
	trixie	2.8.8+dfsg-1	vulnerable
	forky, sid	2.8.8+dfsg-2	vulnerable
libsdl3-image (PTS)	trixie	3.2.4+ds-1	vulnerable
	forky, sid	3.4.0+ds-1	vulnerable
sdl-image1.2 (PTS)	bullseye	1.2.12-12	vulnerable
	bookworm	1.2.12-13	vulnerable
	forky, sid, trixie	1.2.12-14	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version
libsdl2-image	source	(unstable)	(unfixed)
libsdl3-image	source	(unstable)	(unfixed)
sdl-image1.2	source	(unstable)	(unfixed)

Notes

https://github.com/libsdl-org/SDL_image/security/advisories/GHSA-gq8w-x74c-h6p7
https://github.com/libsdl-org/SDL_image/commit/996bf12888925932daace576e09c3053410896f8 (main)
https://github.com/libsdl-org/SDL_image/commit/a1a06276a51ca7e6e63908b200df8a278d8c5039 (SDL2)
https://github.com/libsdl-org/SDL_image/commit/678ac6a4c6021853485050926f45db08ba6aec48 (SDL-1.2)