---
cve: "CVE-2026-9640"
severity: "HIGH"
cvss: 7.2
epss: "37%"
vendor: "Canonical"
kev: false
exploited: false
published: "2026-06-26 16:16:37"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-18T01:08:35+02:00"
---

# CVE-2026-9640

> 7.2 HIGH · 🧪 PoC

## Beschreibung

A privilege escalation vulnerability exists in LXD from 6.0 before 6.9, 5.21.0 before 5.21.5, and 5.0.0 before 5.0.7 regarding the handling of project-restriction policies during snapshot restoration.. An authenticated project operator in a restricted multi-tenant environment can bypass policy restrictions by importing a maliciously crafted instance backup containing restricted configuration keys within a snapshot. When the snapshot is restored, these restricted keys are applied to the live instance without policy validation. Starting the modified instance grants the operator unauthorized host root access.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 7b1f0b6acefa288398ead8dda48b046d7b2795a3 (Commit)
- c5184be310b13a8be5d9a5f286bfa1c0c286716e (Commit)

## Referenzen

- <https://github.com/canonical/lxd/security/advisories/GHSA-ppq7-4492-5552>
- <https://github.com/canonical/lxd/pull/18301>
- <https://github.com/canonical/lxd/pull/18303>
- <https://github.com/canonical/lxd/pull/18304>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-9640) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_