---
cve: "CVE-2026-84268"
severity: "HIGH"
cvss: 8.8
epss: "0.3%"
vendor: "Gnome"
kev: false
exploited: false
published: "2026-09-01 16:17:37"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T02:42:12+02:00"
---

# CVE-2026-84268

> 8.8 HIGH

## Beschreibung

A flaw was found in the SFTP backend in gvfs. When mounting a share and reading a file, a malicious SFTP server can cause read_reply() to process a length that exceeds the size requested by the client. The function does not verify the server-provided length against the allocated buffer size, causing the operation to write past the intended boundaries. This issue allows a malicious server to corrupt adjacent heap memory in the gvfsd-sftp process, resulting in a denial of service as the process aborts upon detecting the heap corruption or potentially allowing arbitrary code execution.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 5651571370400cf0a114f61af2fa96e0ff4784d5 (Commit)

## Referenzen

- <https://access.redhat.com/security/cve/CVE-2026-84268>
- <https://bugzilla.redhat.com/show_bug.cgi?id=2526485>
- <https://gitlab.gnome.org/GNOME/gvfs/-/issues/862>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-84268) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_