{"cve":"CVE-2026-24708","nvd":{"published":"2026-02-18T18:24:33.087","modified":"2026-09-11T13:17:13.113","status":"Deferred","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:H","score":8.2},"cwes":["CWE-669","CWE-73"],"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/errata/RHSA-2026:54757","https://access.redhat.com/errata/RHSA-2026:66401"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:23:35.260773158+00:00"},"epss":{"cve":"CVE-2026-24708","score":0.00416,"percentile":0.3593,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-m4f3-qp2w-gwh6","url":"https://osv.dev/vulnerability/GHSA-m4f3-qp2w-gwh6","summary":"OpenStack Nova calls qemu-img without format restrictions for resize ","modified":"2026-07-13T16:43:30.495970967Z","packages":[{"ecosystem":"PyPI","name":"nova","purl":"pkg:pypi/nova","ranges":[">=32.0.0.0rc1 <=32.1.0"],"fixed":[]},{"ecosystem":"PyPI","name":"nova","purl":"pkg:pypi/nova","ranges":[">=31.0.0.0rc1 <=31.2.0"],"fixed":[]},{"ecosystem":"PyPI","name":"nova","purl":"pkg:pypi/nova","ranges":["<=30.2.1"],"fixed":[]}]},{"id":"PYSEC-2026-2685","url":"https://osv.dev/vulnerability/PYSEC-2026-2685","summary":"OpenStack Nova calls qemu-img without format restrictions for resize ","modified":"2026-07-13T16:32:17.539738838Z","packages":[{"ecosystem":"PyPI","name":"nova","purl":"pkg:pypi/nova","ranges":["<=30.2.1",">=31.0.0.0rc1 <=31.2.0",">=32.0.0.0rc1 <=32.1.0"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}