CVE-2026-24708

What it is

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.

At a glance

Exploitability

Can be exploited over the network with a low-privilege account. High risk of data tampering, service disruption.

Exploit odds

0.4% chance of exploitation in the next 30 days (EPSS).

Fix

No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

1. 2026-01-24 00:00 UTC ReservedThe CVE id was reserved by its CNA
2. 2026-02-18 18:24 UTC PublishedDisclosed publicly on CVE.org and NVD
3. 2026-09-11 13:17 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 0.4% in the next 30 days (EPSS).
• Severity: 8.2 HIGH (CVSS).
• Fix: none linked yet, which raises it.

Details

Published

2026-02-18 18:24 UTC

Last modified

2026-09-11 13:17 UTC

Exploit probability

0.4% · EPSS, next 30 days

Weakness

CWE-669

Record status

Deferred

Attack profile CVSS 3.1 · 8.2

Attack vector

Network

Complexity

High

Privileges needed

Low

User interaction

None

Scope

Changed

Confidentiality

None

Integrity

High

Availability

High

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2026-24708.md and follow it. Check whether this project is affected by CVE-2026-24708. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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