---
cve: "CVE-2026-55693"
severity: "MEDIUM"
cvss: 5.7
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: "2026-09-16T22:36:06+02:00"
---

# CVE-2026-55693

> 5.7 MEDIUM · 🧪 PoC

## Beschreibung

Vim is an open source, command line text editor. Prior to 9.2.0653, the tree_count_words() function in src/spellfile.c fills in the word-count fields of a spell-file word trie by walking it iteratively with a depth counter. 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 (arridx[], curi[], wordcount[]). A crafted .spl/.sug file pair, loaded when the user invokes spell suggestion, 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 9.2.0653.

## CVSS-Vektor

```
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |

## Patch verfügbar (OSV)

- a80874d9b84a01040e3d1aef2d4a59e1934dafb7 (Commit)

## Referenzen

- <https://github.com/vim/vim/security/advisories/GHSA-wgh4-64f7-q3jq>
- <https://github.com/vim/vim/commit/a80874d9b84a01040e3d1aef2d4a59e1934dafb7>
- <https://github.com/vim/vim/releases/tag/v9.2.0653>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-55693) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_