# CVE-2026-6843: nano: A flaw was found in nano

CVE-2026-6843 is fixed in 6 products on 1 platform, first by FEDORA-2026-D0A0F1C3D2, released April 30, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-6843
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0011
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 22, 2026

## Description

A flaw was found in nano. A local user could exploit a format string vulnerability in the `statusline()` function. By creating a directory with a name containing `printf` specifiers, the application attempts to display this name, leading to a segmentation fault (SEGV). This results in a Denial of Service (DoS) for the `nano` application.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | default-editor Fedora 43 | 8.5-3.fc43 | [FEDORA-2026-D0A0F1C3D2](https://patchblox.com/security/data/fix/linux/fedora-2026-d0a0f1c3d2.md) | Apr 30, 2026 |
| Linux | nano Debian 13.5 (trixie) | 8.4-1+deb13u1 | [DEBIAN-CVE-2026-6843](https://patchblox.com/security/data/fix/linux/debian-cve-2026-6843.md) | May 15, 2026 |
| Linux | nano Debian 14 | 9.0-1 | [DEBIAN-CVE-2026-6843](https://patchblox.com/security/data/fix/linux/debian-cve-2026-6843.md) | May 15, 2026 |
| Linux | nano Fedora 43 | 8.5-3.fc43 | [FEDORA-2026-D0A0F1C3D2](https://patchblox.com/security/data/fix/linux/fedora-2026-d0a0f1c3d2.md) | Apr 30, 2026 |
| Linux | nano Ubuntu 22.04.1 LTS (jammy) | 6.2-1ubuntu0.2 | [nano 6.2-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-nano-6.2-1ubuntu0.2.md) | Jun 24, 2026 |
| Linux | nano Ubuntu 24.04.5 LTS (noble) | 7.2-2ubuntu0.2 | [nano 7.2-2ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-nano-7.2-2ubuntu0.2.md) | Jun 24, 2026 |
| Linux | nano Ubuntu 25.10 (questing) | 8.4-1ubuntu0.1 | [nano 8.4-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-nano-8.4-1ubuntu0.1.md) | Jun 24, 2026 |
| Linux | nano Ubuntu 26.04.1 LTS (resolute) | 8.7.1-1ubuntu0.1 | [nano 8.7.1-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-nano-8.7.1-1ubuntu0.1.md) | Jul 22, 2026 |
| Linux | nano opensuse-leap 16.0 | 9.1-bp160.1.1 | [OPENSUSE-SU-2026:21166-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21166-1.md) | Jun 29, 2026 |
| Linux | nano-debuginfo Fedora 43 | 8.5-3.fc43 | [FEDORA-2026-D0A0F1C3D2](https://patchblox.com/security/data/fix/linux/fedora-2026-d0a0f1c3d2.md) | Apr 30, 2026 |
| Linux | nano-debugsource Fedora 43 | 8.5-3.fc43 | [FEDORA-2026-D0A0F1C3D2](https://patchblox.com/security/data/fix/linux/fedora-2026-d0a0f1c3d2.md) | Apr 30, 2026 |
| Linux | nano-default-editor Fedora 43 | 8.5-3.fc43 | [FEDORA-2026-D0A0F1C3D2](https://patchblox.com/security/data/fix/linux/fedora-2026-d0a0f1c3d2.md) | Apr 30, 2026 |
| Linux | nano-tiny Ubuntu 22.04.1 LTS (jammy) | 6.2-1ubuntu0.2 | [nano-tiny 6.2-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-nano-tiny-6.2-1ubuntu0.2.md) | Jun 24, 2026 |
| Linux | nano-tiny Ubuntu 24.04.5 LTS (noble) | 7.2-2ubuntu0.2 | [nano-tiny 7.2-2ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-nano-tiny-7.2-2ubuntu0.2.md) | Jun 24, 2026 |
| Linux | nano-tiny Ubuntu 25.10 (questing) | 8.4-1ubuntu0.1 | [nano-tiny 8.4-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-nano-tiny-8.4-1ubuntu0.1.md) | Jun 24, 2026 |
| Linux | nano-tiny Ubuntu 26.04.1 LTS (resolute) | 8.7.1-1ubuntu0.1 | [nano-tiny 8.7.1-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-nano-tiny-8.7.1-1ubuntu0.1.md) | Jul 22, 2026 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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