Incorrect Resource Transfer Between Spheres Affecting nova package, versions <3:29.2.0-0ubuntu1.3


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.42% (35th percentile)

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  • Snyk IDSNYK-UBUNTU2404-NOVA-15354190
  • published26 Feb 2026
  • disclosed18 Feb 2026

Introduced: 18 Feb 2026

CVE-2026-24708  (opens in a new tab)
CWE-669  (opens in a new tab)

How to fix?

Upgrade Ubuntu:24.04 nova to version 3:29.2.0-0ubuntu1.3 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream nova package and not the nova package as distributed by Ubuntu. See How to fix? for Ubuntu:24.04 relevant fixed versions and status.

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 Base Scores

version 3.1