GitHub Advisoryadvisory · PyPI

GHSA-m4f3-qp2w-gwh6 OpenStack Nova calls qemu-img without format restrictions for resize

HIGH Published 2026-02-18 Modified 2026-02-21 Official page ↗
Aliases
CVE-2026-24708
Ecosystem
PyPI
Packages
Nova
Severity
High
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:H
Weaknesses
CWE-669
Reviewed
2026-02-19

Affected packages

• PyPI Nova: >= 32.0.0.0rc1, <= 32.1.0 (no fix yet) • PyPI Nova: >= 31.0.0.0rc1, <= 31.2.0 (no fix yet) • PyPI Nova: <= 30.2.1 (no fix yet)

Description

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.

Related

Alias · CVE (1)

  • CVE-2026-24708 An issue was discovered in OpenStack Nova before 30.2.2, 31 before 31.2.1, and 32 before 32.1.1. vulnerability

Weakness · CWE (1)

  • CWE-669 Incorrect Resource Transfer Between Spheres weakness

References