# CVE-2023-40359: xterm: xterm before 380 supports ReGIS reporting for character-set names even if they have unexpected characters (i.e., neit...

CVE-2023-40359 is fixed in xterm on 1 platform, first by DEBIAN-CVE-2023-40359, released August 14, 2023. It is not reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2023-40359
- Priority: Urgent
- CVSS: 9.8 (critical)
- EPSS: 0.0086
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 14, 2023

## Description

xterm before 380 supports ReGIS reporting for character-set names even if they have unexpected characters (i.e., neither alphanumeric nor underscore), aka a pointer/overflow issue. This can only occur for xterm installations that are configured at compile time to use a certain experimental feature.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | xterm Debian 13.5 (trixie) | 382-2 | [DEBIAN-CVE-2023-40359](https://patchblox.com/security/data/fix/linux/debian-cve-2023-40359.md) | Aug 14, 2023 |
| Linux | xterm Debian 14 | 382-2 | [DEBIAN-CVE-2023-40359](https://patchblox.com/security/data/fix/linux/debian-cve-2023-40359.md) | Aug 14, 2023 |

---

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.