# CVE-2023-24809: nethack: NetHack is a single player dungeon exploration game

CVE-2023-24809 is fixed in nethack on 1 platform, first by DEBIAN-CVE-2023-24809, released February 17, 2023. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2023-24809
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0024
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 17, 2023

## Description

NetHack is a single player dungeon exploration game. Starting with version 3.6.2 and prior to version 3.6.7, illegal input to the "C" (call) command can cause a buffer overflow and crash the NetHack process. This vulnerability may be a security issue for systems that have NetHack installed suid/sgid and for shared systems. For all systems, it may result in a process crash. This issue is resolved in NetHack 3.6.7. There are no known workarounds.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | nethack Debian 13.5 (trixie) | 3.6.7-1 | [DEBIAN-CVE-2023-24809](https://patchblox.com/security/data/fix/linux/debian-cve-2023-24809.md) | Feb 17, 2023 |
| Linux | nethack Debian 14 | 3.6.7-1 | [DEBIAN-CVE-2023-24809](https://patchblox.com/security/data/fix/linux/debian-cve-2023-24809.md) | Feb 17, 2023 |

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Data as of 2026-11-07T18:46:35Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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