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From: Salvatore Bonaccorso <carnil@debian.org>
To: Debian Bug Tracking System <submit@bugs.debian.org>
Subject: libsdl2-image: CVE-2026-35444
Message-ID: <177567452911.2975222.16985954654809678547.reportbug@eldamar.lan>
X-Mailer: reportbug 13.2.0
Date: Wed, 08 Apr 2026 20:55:29 +0200
Delivered-To: submit@bugs.debian.org

Source: libsdl2-image
Version: 2.8.8+dfsg-2
Severity: important
Tags: security upstream
X-Debbugs-Cc: carnil@debian.org, Debian Security Team <team@security.debian.org>
Control: clone -1 -2 -3
Control: reassign -2 src:libsdl3-image 3.4.0+ds-1
Control: retitle -2 libsdl3-image: CVE-2026-35444
Control: reassign -3 src:sdl-image1.2 1.2.12-14
Control: retitle -3 sdl-image1.2: CVE-2026-35444

Hi,

The following vulnerability was published for libsdl2-image.

CVE-2026-35444[0]:
| 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.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2026-35444
    https://www.cve.org/CVERecord?id=CVE-2026-35444
[1] https://github.com/libsdl-org/SDL_image/security/advisories/GHSA-gq8w-x74c-h6p7

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore
]