---
cve: "CVE-2019-15792"
severity: "HIGH"
cvss: 7.1
epss: "1.1%"
vendor: "Ubuntu"
kev: false
exploited: false
published: "2020-04-23 23:55:24"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T18:52:27+02:00"
---

# CVE-2019-15792

> 7.1 HIGH

## Beschreibung

In shiftfs, a non-upstream patch to the Linux kernel included in the Ubuntu 5.0 and 5.3 kernel series, shiftfs_btrfs_ioctl_fd_replace() calls fdget(oldfd), then without further checks passes the resulting file* into shiftfs_real_fdget(), which casts file->private_data, a void* that points to a filesystem-dependent type, to a "struct shiftfs_file_info *". As the private_data is not required to be a pointer, an attacker can use this to cause a denial of service or possibly execute arbitrary code.

## CVSS-Vektor

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

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

## Exploit-Evidenz

- [EDB-47693 — Ubuntu 19.10 - Refcount Underflow and Type Confusion in shiftfs](https://www.exploit-db.com/exploits/47693) ✅

## Referenzen

- <https://usn.ubuntu.com/usn/usn-4183-1>
- <https://usn.ubuntu.com/usn/usn-4184-1>
- <https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/eoan/commit/?id=5df147c8140efc71ac0879ae3b0057f577226d4c>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2019-15792) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_