---
cve: "CVE-2026-55892"
severity: "MEDIUM"
cvss: 5.5
epss: "12%"
vendor: "vim"
kev: false
exploited: false
published: "2026-06-25 16:16:40"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-12T20:01:11+02:00"
---

# CVE-2026-55892

> 5.5 MEDIUM · 🧪 PoC

## Beschreibung

Vim is an open source, command line text editor. Prior to 9.2.0662, the dump_prefixes() function in src/spell.c walks a spell-file prefix trie iteratively with a depth counter while dumping the prefixes that apply to a word. The counter is bounded only by the trie structure itself; it is never checked against the size of the fixed MAXWLEN-element stack arrays it indexes (prefix[], arridx[], curi[]). A crafted .spl file, loaded when the user dumps the word list, can drive the descent arbitrarily deep, so the function writes past the end of those arrays. This is a stack out-of-bounds write that corrupts the call frame and crashes the editor. This vulnerability is fixed in 9.2.0662.

## CVSS-Vektor

```
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Erforderlich | good |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Keine | good |
| I Integrität | Keine | good |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- 8325b193bba5f01e7a7d8241fc8633d93dff996b (Commit)
- 8325b193bba5f01e7a7d8241f (Commit)

## Referenzen

- <https://github.com/vim/vim/security/advisories/GHSA-qm9w-fmpj-879h>
- <https://github.com/vim/vim/commit/8325b193bba5f01e7a7d8241f>
- <https://github.com/vim/vim/releases/tag/v9.2.0662>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-55892) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_