CVE-2021-20240

gdk-pixbuf: integer wraparound in the GIF loader of gdk-pixbuf via crafted input leads to segmentation fault

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Severity

Important

Red Hat Product Security

8.1

CVSS 3.1

Review impact separately from score.

Published · January 19, 2021

Updated · June 27, 2026

Description

A flaw was found in gdk-pixbuf. An integer wraparound leading to an out of bounds write can occur when a crafted GIF image is loaded. An attacker may cause applications to crash or could potentially execute code on the victim system. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Statement

This issue did not affect the versions of gdk-pixbuf2 as shipped with Red Hat Enterprise Linux 6, 7, and 8 as they did not include the vulnerable code.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 8.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE-787 · Out-of-bounds Write