Skip to content
Fencer Vulns
high 7.1

CVE-2026-35444 json

SDL_image has a heap buffer overflow READ via unchecked colormap index in XCF loader

published 2026-04-06 7 mo ago modified 2026-07-24 3 mo ago also EUVD-2026-19527

cvss
7.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 18%
public exploits
0
none known

Summary

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.

Patch / fix

  • libsdl sdl_image 2026-04-02
  • libsdl2-image Debian 13 2.8.8+dfsg-1+deb13u1
  • libsdl2-image Debian 14 2.8.10+dfsg-1
  • libsdl3-image Debian 13 3.2.4+ds-1+deb13u1
  • libsdl3-image Debian 14 3.4.2+ds-1

debian advisories DEBIAN-CVE-2026-35444

  • SDL2_image openSUSE Tumbleweed 2.8.10-1.1
  • SDL3_image openSUSE Tumbleweed 3.4.2-1.1

opensuse advisories openSUSE-SU-2026:10494-1openSUSE-SU-2026:10493-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-35444 updated cvss 7.1

SDL_image: SDL_image: Information disclosure via crafted XCF files

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
7 mo ago

Exploit prediction

0.27% chance of exploitation in the next 30 days, higher than 18% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:L
NVD 3.1 6.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:L

Affected products

  • libsdl-org SDL_image

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.