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CVE-2026-35444— SDL_image has a heap buffer overflow READ via unchecked colormap index in XCF loader

Quick assessment

Affected
libsdl-org SDL_image
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

SDL_image是Simple Directmedia Layer开源的一个支持多种格式的图像加载库。 SDL_image存在缓冲区错误漏洞，该漏洞源于未验证像素索引值，可能导致堆越界读取。

CVSS 7.1 · High EPSS 0.26% · P18

Possible ATT&CK Techniques 1 AI

T1010 · Application Window Discovery
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I. Basic Information for CVE-2026-35444

Vulnerability Information
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Vulnerability Title
SDL_image has a heap buffer overflow READ via unchecked colormap index in XCF loader
Source: CVE Program / CVE List V5
Vulnerability 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 Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
SDL_image 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
SDL_image是Simple Directmedia Layer开源的一个支持多种格式的图像加载库。 SDL_image存在缓冲区错误漏洞，该漏洞源于未验证像素索引值，可能导致堆越界读取。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
libsdl-org SDL_image < 996bf12888925932daace576e09c3053410896f8 -

II. Public POCs for CVE-2026-35444

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III. Intelligence Information for CVE-2026-35444

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IV. Related Vulnerabilities

Same product: SDL_image
Same vendor: libsdl-org
Same weakness: CWE-125