RHSA-2026:7884 - Security Advisory

Topic

An update for openstack-nova is now available for Red Hat OpenStack
Services on OpenShift 18.0.18 (Antelope).

Red Hat Product Security has rated this update as having a security impact
of Important. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available for each vulnerability
from the CVE link(s) in the References section.

Description

OpenStack Compute (nova) is open source software designed
to provision and manage large networks of virtual machines, creating a
redundant and scalable cloud computing platform. It gives you the software,
control panels, and APIs required to orchestrate a cloud, including running
instances, managing networks, and controlling access through users and
projects. OpenStack Compute strives to be both hardware and hypervisor
agnostic, currently supporting a variety of standard hardware
configurations and seven major hypervisors.

Security Fix(es):

• Arbitrary Host File Overwrite via Unconstrained qemu-img Format Handling in OpenStack Nova (CVE-2026-24708)

For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE
page listed in the References section.

Solution

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat OpenStack Services on OpenShift 18.0 x86_64

Fixes

• BZ - 2430312 - CVE-2026-24708 openstack-nova-compute: Arbitrary Host File Overwrite via Unconstrained qemu-img Format Handling in OpenStack Nova

CVEs

• CVE-2026-24708

References

• https://access.redhat.com/security/updates/classification/#important