---
title: "CVE-2026-4407\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-2026-4407?format=md
keywords: index, follow
---

# CVE-2026-4407

Publication date 18 March 2026

Last updated 10 July 2026

---

Ubuntu priority

**Medium**

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

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## Description

Out-of-bounds array write in Xpdf 4.06 and earlier, due to incorrect
validation of the "N" field in ICCBased color spaces.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2026-4407?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| xpdf | 26.04 LTS resolute | Needs evaluation |
| 25.10 questing | Ignored end of life, was needs-triage |
| 24.04 LTS noble | Needs evaluation |
| 22.04 LTS jammy | Needs evaluation |
| 18.04 LTS bionic | Needs evaluation |
| 16.04 LTS xenial | Needs evaluation |
| ipe | 26.04 LTS resolute | Needs evaluation |
| 25.10 questing | Ignored end of life, was needs-triage |
| 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)

## Notes

---

### [mdeslaur](https://launchpad.net/~mdeslaur)

In trusty to bionic, xpdf is built with poppler as the backend
library, so most xpdf issues don't apply to it. In jammy and
later, the xpdf package is actually xpopple, a fork that also
builds against poppler.

## Severity score breakdown

CVSS version:
CVSS v4.0

**Base score**

2.1 · Low

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Local |
  | Attack complexity | High |
  | Attack requirements | None |
  | Privileges required | None |
  | User interaction | None |
  | Vulnerable system - Confidentiality impact | None |
  | Vulnerable system - Integrity impact | None |
  | Vulnerable system - Availability impact | Low |
  | Subsequent system - Confidentiality impact | None |
  | Subsequent system - Integrity impact | None |
  | Subsequent system - Availability impact | None |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 2.1 · Low |
  | Base + Threat score | - |
  | Base + Environmental score | - |
  | Base + Threat + Environmental score | - |

**Vector:** CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4407)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2026-4407)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2026-4407)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2026-4407)

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2026-4407>
* <https://www.xpdfreader.com/security-bug/CVE-2026-4407.html>