CVE-2026-24708
- State
- Published
- Severity
- 8.2 High
- Published
- Feb 18, 2026
- Updated
- Sep 11, 2026
- Reserved
- Jan 24, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 8.2 High | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:H | mitre |
| 3.1 | 7.1 High | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H | redhat-SADP |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
NovaOpenStack |
|
References
- 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/security/cve/CVE-2026-24708vdb-entry
- RHBZ#2430312issue-tracking
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-24708.json
- https://access.redhat.com/errata/RHSA-2026:54757vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:66401vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:7884vendor-advisory
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