---
title: "CVE-2026-65610\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-2026-65610?format=md
keywords: index, follow
---

# CVE-2026-65610

Publication date 19 August 2026

Last updated 2 September 2026

---

Ubuntu priority

**Medium**

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

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## Description

nnn stores homelen variable as uchar\_t, which can only represent values in
the range 0-255. An attacker who can influence the victim's execution
environment can provide an arbitrary HOME path with length that is
truncated to 0. The expression (homelen - 1) is promoted to signed int
and becomes -1 and producing an out-of-bounds read and an out-of-bounds
write one byte before the path buffer.
Maintainer of this project was notified about this vulnerability. It might
has been addressed, but the maintainer did not provide a vulnerable version
range. Only version 5.2 was tested and confirmed as vulnerable.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| nnn | 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 |

---

* [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 v4.0

**Base score**

2.4 · Low

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Local |
  | Attack complexity | Low |
  | Attack requirements | None |
  | Privileges required | Low |
  | User interaction | Active |
  | Vulnerable system - Confidentiality impact | Low |
  | Vulnerable system - Integrity impact | Low |
  | 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 | 2.4 · Low |
  | Base + Threat score | - |
  | Base + Environmental score | - |
  | Base + Threat + Environmental score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-65610)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2026-65610)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2026-65610)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2026-65610)

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2026-65610>