CyberSecBulletin
CVE-2026-24708NVD status: Deferred

Nova: Incorrect Resource Transfer Between Spheres

Published Updated By the CyberSecBulletin desk

CVE-2026-24708 is a high-severity incorrect resource transfer between spheres vulnerability in Nova from OpenStack, with a CVSS 3.1 base score of 8.2 out of 10. It can be exploited remotely over the network by an attacker with a low-privileged account, without any action from a user. The record lists versions 30.2.2, 31.2.1, 32.1.1 as the first without the flaw, so updating Nova to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.41% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update Nova to 30.2.2 or 31.2.1 or 32.1.1, whichever matches your release line, or a later version.

Affected products and versions

VendorProductAffected versionsFixed in
OpenStackNovabefore 30.2.2; 31.0.0 up to, but not including, 31.2.1; 32.0.0 up to, but not including, 32.1.130.2.2, 31.2.1, 32.1.1
Red HatRed Hat OpenStack Platform 16.2Not specified in the recordNot stated
Red HatRed Hat OpenStack Platform 17.1 for RHEL 9Not specified in the recordNot stated
Red HatRed Hat OpenStack Services on OpenShift 18.0Not specified in the recordNot stated
Red HatRed Hat OpenStack Platform 13 (Queens)Not specified in the recordNot stated
Red HatRed Hat OpenStack Platform 17.1Not specified in the recordNot stated
Red HatRed Hat OpenStack Platform 18.0Not specified in the recordNot stated

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
HighSuccess depends on conditions outside the attacker's control.
Privileges required
LowA basic user account is enough.
User interaction
NoneNo action by a victim is required.
Scope
ChangedThe attack can reach beyond the vulnerable component into other systems.
Confidentiality
NoneNo data is disclosed.
Integrity
HighData or code can be modified at will.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:H. Scored by CNA (mitre.org).

Scoring systemScoreSeverityScored by
CVSS 3.18.2HighCNA (mitre.org)
CVSS 3.17.1HighCNA

Official 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.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Incorrect Resource Transfer Between Spheres

The product does not properly transfer a resource/behavior to another sphere, or improperly imports a resource/behavior from another sphere, in a manner that provides unintended control over that resource.

More Incorrect Resource Transfer Between Spheres vulnerabilities (CWE-669)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
  3. Record last changed materially (score, affected products, status or references).

References

Recent Incorrect Resource Transfer Between Spheres vulnerabilities

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