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CVE-2026-24708

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CVE-2026-24708

Published: Feb 18, 2026

Modified: Feb 21, 2026

PUBLISHED

CVSS v3.1

8.2

HIGH

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.

VendorProductVersions

OpenStack

Nova

affected
0 - < 30.2.2
affected
31.0.0 - < 31.2.1
affected
32.0.0 - < 32.1.1

Weaknesses (CWE)

CWE-669

CVSS v3.1 Details

CVSS v3.1 Vector

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

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

High

Availability

High

References

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