---
title: "CVE-2026-78465\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2026-78465?format=md
keywords: index, follow
---

# CVE-2026-78465

Publication date 24 August 2026

Last updated 2 September 2026

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**7.0 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2026-78465?format=md#impact-score)

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## Description

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.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| gimp | 26.04 LTS resolute | Needs evaluation |
| 24.04 LTS noble | Needs evaluation |
| 22.04 LTS jammy | Needs evaluation |
| 20.04 LTS focal | Needs evaluation |
| 18.04 LTS bionic | Needs evaluation |
| 16.04 LTS xenial | Needs evaluation |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

7.0 · High

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Local |
  | Attack complexity | High |
  | Privileges required | None |
  | User interaction | Required |
  | Scope | Unchanged |
  | Confidentiality impact | High |
  | Integrity impact | High |
  | Availability impact | High |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 7.0 · High |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-78465)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2026-78465)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2026-78465)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2026-78465)

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2026-78465>
* <https://gitlab.gnome.org/GNOME/gimp/-/work_items/16578>