---
cve: "CVE-2026-24708"
severity: "HIGH"
cvss: 8.2
epss: "34%"
vendor: "OpenStack"
kev: false
exploited: false
published: "2026-02-18 18:24:33"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-13T20:22:17+02:00"
---

# CVE-2026-24708

> 8.2 HIGH

## Beschreibung

An issue was discovered in OpenStack Nova before 30.2.2, 31 before 31.2.1, and 32 before 32.1.1. By writing a malicious QCOW header to a root or ephemeral disk and then triggering a resize, a user may convince Nova's Flat image backend to call qemu-img without a format restriction, resulting in an unsafe image resize operation that could destroy data on the host system. Only compute nodes using the Flat image backend (usually configured with use_cow_images=False) are affected.

## CVSS-Vektor

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

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

## Referenzen

- <https://bugs.launchpad.net/nova/+bug/2137507>
- <https://www.openwall.com/lists/oss-security/2026/02/17/7>
- <https://lists.debian.org/debian-lts-announce/2026/02/msg00025.html>
- <https://access.redhat.com/errata/RHSA-2026:54757>
- <https://access.redhat.com/errata/RHSA-2026:66401>
- <https://access.redhat.com/errata/RHSA-2026:7884>
- <https://access.redhat.com/security/cve/CVE-2026-24708>
- <https://bugzilla.redhat.com/show_bug.cgi?id=2430312>
- <https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-24708.json>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-24708) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_