---
cve: "CVE-2026-115377"
severity: "CRITICAL"
cvss: 9.4
epss: ""
vendor: "lxc"
kev: false
exploited: false
published: "2026-10-22 21:32:43"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-10-25T12:24:50+01:00"
---

# CVE-2026-115377

> 9.4 CRITICAL · 🧪 PoC

## Beschreibung

Incus before 6.0.7, 6.1.0 before 7.0.2, and 7.1.0 before 7.5.0 contains an arbitrary file write vulnerability that allows malicious migration sources to write host files by planting symlinks in transferred volumes. Attackers can craft rsync or btrfs receive streams with a symlink such as rootfs pointing to the host root, writing files as root for full host compromise.

## CNA-Record (Kanon, cvelistV5)

- CNA: **VulnCheck**
- State: PUBLISHED
- Stand: 2026-10-22 19:13:46
- CNA-CVSS: **9.4** (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H`)

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |

## Schwachstellen-Klasse

- **CWE-59** — Improper Link Resolution Before File Access ('Link Following')
  The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

## Angriffsmuster (CAPEC)

- [CAPEC-17 — Using Malicious Files](https://capec.mitre.org/data/definitions/17.html) _(Severity: Very High)_
- [CAPEC-35 — Leverage Executable Code in Non-Executable Files](https://capec.mitre.org/data/definitions/35.html) _(Severity: Very High)_
- [CAPEC-76 — Manipulating Web Input to File System Calls](https://capec.mitre.org/data/definitions/76.html) _(Severity: Very High)_
- [CAPEC-132 — Symlink Attack](https://capec.mitre.org/data/definitions/132.html) _(Severity: High)_

## ATT&CK-Techniken

- [T1574.005 — Hijack Execution Flow: Executable Installer File Permissions](https://attack.mitre.org/techniques/T1574/005/)
- [T1574.010 — Hijack Execution Flow: Services File Permissions Weakness](https://attack.mitre.org/techniques/T1574/010/)
- [T1027.006 — Obfuscated Files or Information: HTML Smuggling](https://attack.mitre.org/techniques/T1027/006/)
- [T1027.009 — Obfuscated Files or Information: Embedded Payloads](https://attack.mitre.org/techniques/T1027/009/)
- [T1564.009 — Hide Artifacts: Resource Forking](https://attack.mitre.org/techniques/T1564/009/)
- [T1547.009 — Boot or Logon Autostart Execution:Shortcut Modification](https://attack.mitre.org/techniques/T1547/009/)

## Patch verfügbar (OSV)

- 7678ccc46b2d0b8092b2b9419ab6255e3ca98f00 (Commit)
- 01f81e5e607bbb5818410318e4b3496ad1820824 (Commit)

## Referenzen

- <https://github.com/lxc/incus/security/advisories/GHSA-579w-c4rw-c8q3>
- <https://www.vulncheck.com/advisories/incus-before-6.0.7-6.1.0-before-7.0.2-and-7.1.0-before-7.5.0-arbitrary-file-write-via-symlink-in-migration-stream>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-115377/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_