# CVE-2026-24708

## Summary

- **CVE ID:** CVE-2026-24708
- **Severity:** HIGH
- **CVSS Score:** 8.2 (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:H)
- **CWE:** CWE-669
- **Published:** Feb 18, 2026
- **Last Modified:** Aug 14, 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.

## Affected Products

- OpenStack — Nova (0)
- OpenStack — Nova (31.0.0)
- OpenStack — Nova (32.0.0)

## References

- [CNA](https://bugs.launchpad.net/nova/+bug/2137507)
- [CNA](https://www.openwall.com/lists/oss-security/2026/02/17/7)
- [CVE](https://lists.debian.org/debian-lts-announce/2026/02/msg00025.html)
- [redhat-SADP](https://access.redhat.com/security/cve/CVE-2026-24708)
- [redhat-SADP](https://bugzilla.redhat.com/show_bug.cgi?id=2430312)
- [redhat-SADP](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-24708.json)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:7884)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:54757)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.34%
- **EPSS Percentile:** 27.2

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._