CVE-2026-24708
8.2
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:H
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| OpenStack | Nova | 0 < 30.2.2 | affected |
| OpenStack | Nova | 31.0.0 < 31.2.1 | affected |
| OpenStack | Nova | 32.0.0 < 32.1.1 | affected |
Weaknesses
- CWE-669: CWE-669 Incorrect Resource Transfer Between Spheres
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: partial
CVE Program Container
Additional References
openstack-nova-compute: Arbitrary Host File Overwrite via Unconstrained qemu-img Format Handling in OpenStack Nova
Additional References
- https://access.redhat.com/security/cve/CVE-2026-24708
- https://bugzilla.redhat.com/show_bug.cgi?id=2430312
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-24708.json
- https://access.redhat.com/errata/RHSA-2026:7884
References
- https://bugs.launchpad.net/nova/+bug/2137507
- https://www.openwall.com/lists/oss-security/2026/02/17/7
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