CVE WatchSep 11, 2026

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. By writing a malicious QCOW header to a roo

CVSS

8.2

High

EPSS

0.4%

p32

KEV

—

Exploit Today

0-100

Published: Feb 18, 2026 · Last modified: Sep 11, 2026 · CWE-669 · CWE-73

EPSS · 30d

0.3%EPSS · 30 days0.4%

2026-08-232026-09-20

Technical 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.

Official references

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