Ubuntu USN · USN-8386-1

Nano vulnerabilities

Published: Thu, 04 Jun 2026 17:00

CVE-2026-6843CVE-2026-6842

Summary

Several security issues were fixed in Nano.

Details

Michał Majchrowicz and Marcin Wyczechowski discovered that Nano created the ~/.local directory with incorrect permissions. In environments with permissive umask settings, a local attacker could possibly use this issue to inject a malicious launcher file, resulting in information disclosure or other unintended actions. (CVE-2026-6842) Michał Majchrowicz and Marcin Wyczechowski discovered that Nano incorrectly handled directory names when updating the status line. A local attacker could possibly use this issue to cause Nano to crash, resulting in a denial of service. This issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, Ubuntu 25.10, and Ubuntu 26.04 LTS. (CVE-2026-6843)

Recommended actions per Ubuntu release

StackPatch playbook auto-generated per release codename and per affected package.

Ubuntu bionic

nano→2.9.3-2ubuntu0.1~esm2apt_upgrade_esm
Fixed at 2.9.3-2ubuntu0.1~esm2 — ESM-only. Enable Ubuntu Pro (free for 5 personal machines) or treat as watch item.
```
sudo pro attach <token>
sudo apt-get update
sudo apt-get install --only-upgrade -y nano=2.9.3-2ubuntu0.1~esm2
```
Sign up at https://ubuntu.com/pro. Free for personal + small-team use.
nano→2.9.3-2ubuntu0.1~esm2apt_upgrade_esm
Fixed at 2.9.3-2ubuntu0.1~esm2 — ESM-only. Enable Ubuntu Pro (free for 5 personal machines) or treat as watch item.
```
sudo pro attach <token>
sudo apt-get update
sudo apt-get install --only-upgrade -y nano=2.9.3-2ubuntu0.1~esm2
```
Sign up at https://ubuntu.com/pro. Free for personal + small-team use.
nano-tiny→2.9.3-2ubuntu0.1~esm2apt_upgrade_esm
Fixed at 2.9.3-2ubuntu0.1~esm2 — ESM-only. Enable Ubuntu Pro (free for 5 personal machines) or treat as watch item.
```
sudo pro attach <token>
sudo apt-get update
sudo apt-get install --only-upgrade -y nano-tiny=2.9.3-2ubuntu0.1~esm2
```
Sign up at https://ubuntu.com/pro. Free for personal + small-team use.

Ubuntu focal

nano→4.8-1ubuntu1.1+esm1apt_upgrade
Standard apt upgrade. Install 4.8-1ubuntu1.1+esm1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nano
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
nano→4.8-1ubuntu1.1+esm1apt_upgrade
Standard apt upgrade. Install 4.8-1ubuntu1.1+esm1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nano
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
nano-tiny→4.8-1ubuntu1.1+esm1apt_upgrade
Standard apt upgrade. Install 4.8-1ubuntu1.1+esm1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nano-tiny
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu jammy

nano→6.2-1ubuntu0.2apt_upgrade
Standard apt upgrade. Install 6.2-1ubuntu0.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nano
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
nano→6.2-1ubuntu0.2apt_upgrade
Standard apt upgrade. Install 6.2-1ubuntu0.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nano
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
nano-tiny→6.2-1ubuntu0.2apt_upgrade
Standard apt upgrade. Install 6.2-1ubuntu0.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nano-tiny
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu noble

nano→7.2-2ubuntu0.2apt_upgrade
Standard apt upgrade. Install 7.2-2ubuntu0.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nano
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
nano→7.2-2ubuntu0.2apt_upgrade
Standard apt upgrade. Install 7.2-2ubuntu0.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nano
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
nano-tiny→7.2-2ubuntu0.2apt_upgrade
Standard apt upgrade. Install 7.2-2ubuntu0.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nano-tiny
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu questing

nano→8.4-1ubuntu0.1apt_upgrade
Standard apt upgrade. Install 8.4-1ubuntu0.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nano
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
nano→8.4-1ubuntu0.1apt_upgrade
Standard apt upgrade. Install 8.4-1ubuntu0.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nano
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
nano-tiny→8.4-1ubuntu0.1apt_upgrade
Standard apt upgrade. Install 8.4-1ubuntu0.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nano-tiny
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu resolute

nano→8.7.1-1ubuntu0.1apt_upgrade
Standard apt upgrade. Install 8.7.1-1ubuntu0.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nano
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
nano→8.7.1-1ubuntu0.1apt_upgrade
Standard apt upgrade. Install 8.7.1-1ubuntu0.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nano
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
nano-tiny→8.7.1-1ubuntu0.1apt_upgrade
Standard apt upgrade. Install 8.7.1-1ubuntu0.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y nano-tiny
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

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