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 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.
Scoring
- Severity
- HIGH
- CVSS base score
- 8.2
- CVSS vector
- CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:H
- EPSS probability
- 0.34%
- CWE
- CWE-669
- Published
- 2026-02-18
- Last modified
- 2026-08-14
Affected products
- OpenStack Nova
- OpenStack Nova
- OpenStack Nova
Weakness type
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