---
id: CVE-2026-78465
title: 'A flaw was found in the file-pcx plugin in GIMP, affecting 32-bit builds only'
summary: >-
  A flaw was found in the file-pcx plugin in GIMP, affecting 32-bit builds only.
  When processing a PCX image file, the plugin calculates memory allocation
  sizes based on the image dimensions and the number of color planes. If a
  crafted fil…
severity: high
cvss: 7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-190
vendor: gimp
product: gimp
affected:
  - 'gimp >= 3.0.0, <= 3.2.4'
  - gimp = 3.3.1
published: '2026-08-24'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T13:10:00.187'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-78465'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-78465'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2522057'
    label: secalert@redhat.com
  - url: 'https://gitlab.gnome.org/GNOME/gimp/-/work_items/16578'
    label: secalert@redhat.com
  - url: 'https://gitlab.gnome.org/GNOME/gimp/-/work_items/16578'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00281
epssPercentile: 0.19015
ingestedAt: '2026-10-14T13:30:58.563Z'
---

## Overview

A flaw was found in the file-pcx plugin in GIMP, affecting 32-bit builds only. When processing a PCX image file, the plugin calculates memory allocation sizes based on the image dimensions and the number of color planes. If a crafted file sets the number of planes to 4 alongside sufficiently large dimensions, the calculation exceeds the 32-bit integer limit and overflows, resulting in an undersized heap-based buffer allocation. This integer overflow issue results in a heap-based buffer overflow when the plugin subsequently writes image data into the undersized buffer, causing memory corruption, potentially leading to arbitrary code execution or a denial of service.

## Affected

- `gimp >= 3.0.0, <= 3.2.4`
- `gimp = 3.3.1`

## Remediation

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