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Review reviewHigh

CVE-2026-24708

OpenStack Nova, Red Hat OpenStack Services on OpenShift 18.0, Red Hat OpenStack Platform 13 (Queens)

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.

CVSS
8.2
EPSS
0.34%
26.8% percentile
CISA KEV
Not listed
Published
2026.02.19
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.34%
Technical severityCVSS 8.2

Vulnerability overview

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 product and versions

Product
OpenStack Nova, Red Hat OpenStack Services on OpenShift 18.0, Red Hat OpenStack Platform 13 (Queens)
Affected versions
< 30.2.2, >= 31.0.0 < 31.2.1, >= 32.0.0 < 32.1.1
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that OpenStack Nova, Red Hat OpenStack Services on OpenShift 18.0, Red Hat OpenStack Platform 13 (Queens) and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:H
CWE
CWE-669, CWE-73