CVE-2026-24708

🔴 HIGH

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...

Published
Feb 18, 2026
Last Modified
Feb 21, 2026
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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 Scores

CVSS 3.1 8.2
8.2
HIGH
CVSS 2.0 8.2

Additional Information

Source
cve@mitre.org
State
Awaiting analysis

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