---
cve: "CVE-2026-47753"
severity: "MEDIUM"
cvss: 4.4
epss: "3.5%"
vendor: "lxc"
kev: false
exploited: false
published: "2026-08-21 15:16:40"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-07T13:11:26+02:00"
---

# CVE-2026-47753

> 4.4 MEDIUM · 🧪 PoC

## Beschreibung

Incus is a system container and virtual machine manager. Prior to version 7.1.0, `(*backend).CreateInstanceFromBackup` in `internal/server/storage/backend.go` contains a nil-pointer dereference that an authenticated user with permission to create instances in any project can trigger remotely by uploading a crafted backup tarball. The Incus daemon panics and the process crashes, causing denial of service to every project on that cluster member. This is a sibling of `GHSA-fwj8-62r8-8p8m`, `GHSA-r7w7-mmxr-47r9`, and `GHSA-x5r6-jr56-89pv` (all assigned 2026-05-04). Those patches added guards on adjacent fields of the same `backup/config.Config` struct; the `Volume` field on the instance-import path was missed. Version 7.1.0 contains an updated patch.

## CVSS-Vektor

```
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/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 | Gering | warn |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 98e64f0a6fcfdc9676eea0246418d490c53297bf (Commit)

## Referenzen

- <https://github.com/lxc/incus/security/advisories/GHSA-8g7m-96c8-8wwc>
- <https://github.com/lxc/incus/commit/98e64f0a6fcfdc9676eea0246418d490c53297bf>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-47753) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_