high8.2
CVE-2026-24708
OpenStack Nova calls qemu-img without format restrictions for resize
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | Nova | >= 32.0.0.0rc1, <= 32.1.0 | none recorded |
Affected products
| Product | Affected versions |
|---|---|
| OpenStack Nova | before 30.2.2 |
| And 32 | before 32.1.1. |
Versions were read from the advisory text. No structured product data has been published for this record yet.
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://bugs.launchpad.net/nova/+bug/2137507
- https://www.openwall.com/lists/oss-security/2026/02/17/7
- https://lists.debian.org/debian-lts-announce/2026/02/msg00025.html
- https://access.redhat.com/errata/RHSA-2026:54757
- https://access.redhat.com/errata/RHSA-2026:66401
- https://access.redhat.com/errata/RHSA-2026:7884
- 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://github.com/advisories/GHSA-m4f3-qp2w-gwh6
- https://nvd.nist.gov/vuln/detail/CVE-2026-24708
- https://github.com/openstack/nova/commit/3eba22ff09c81a61750fbb4882e5f1f01a20fdf5