---
id: CVE-2025-6199
title: A flaw was found in the GIF parser of GdkPixbuf’s LZW decoder
summary: >-
  A flaw was found in the GIF parser of GdkPixbuf’s LZW decoder. When an invalid
  symbol is encountered during decompression, the decoder sets the reported
  output size to the full buffer length rather than the actual number of written
  bytes…
severity: low
cvss: 3.3
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N'
cwe:
  - CWE-200
vendor: gnome
product: gdkpixbuf
affected:
  - gdkpixbuf = 2.0.0
published: '2025-06-17'
updated: '2026-06-26'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-6199'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2025-6199'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2373147'
    label: secalert@redhat.com
  - url: 'https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/issues/257'
    label: secalert@redhat.com
  - url: 'https://lists.debian.org/debian-lts-announce/2025/06/msg00023.html'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00204
epssPercentile: 0.09173
ingestedAt: '2026-06-26T16:43:13.606Z'
---

## Overview

A flaw was found in the GIF parser of GdkPixbuf’s LZW decoder. When an invalid symbol is encountered during decompression, the decoder sets the reported output size to the full buffer length rather than the actual number of written bytes. This logic error results in uninitialized sections of the buffer being included in the output, potentially leaking arbitrary memory contents in the processed image.

## Affected

- `gdkpixbuf = 2.0.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.