{"id":"CVE-2026-24708","title":"An issue was discovered in OpenStack Nova before 30.2.2, 31 before 31.2.1, and 32 before 32.1.1","summary":"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 t…","severity":"high","cvss":8.2,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:H","cwe":["CWE-669","CWE-73"],"vendor":"OpenStack","product":"Nova","affected":["Nova < 30.2.2","Nova >= 31.0.0 < 31.2.1","Nova >= 32.0.0 < 32.1.1"],"patched":["openstack_platform 16.2","openstack_platform 17.1","openstack_services_on_openshift 18.0"],"published":"2026-02-18","updated":"2026-09-11","sourceUpdated":"2026-09-11T13:17:13.113","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-24708","references":[{"url":"https://bugs.launchpad.net/nova/+bug/2137507","label":"cve@mitre.org"},{"url":"https://www.openwall.com/lists/oss-security/2026/02/17/7","label":"cve@mitre.org"},{"url":"https://lists.debian.org/debian-lts-announce/2026/02/msg00025.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2026:54757","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:66401","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:7884","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/security/cve/CVE-2026-24708","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2430312","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-24708.json","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-24708"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-24708"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-02-19T19:07:53.345297Z"},"epss":0.00381,"epssPercentile":0.31822,"scores":{"nvd":8.2,"vendor":7.1,"cna":8.2},"ingestedAt":"2026-07-03T18:53:52.434Z","slug":"CVE-2026-24708","body":"## Overview\n\nAn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **RHSA-2026:54757** · Red Hat · fixed in: Red Hat OpenStack Platform 16.2 · released 2026-08-13 · [advisory](https://access.redhat.com/errata/RHSA-2026:54757)\n- **RHSA-2026:66401** · Red Hat · fixed in: Red Hat OpenStack Platform 17.1 · released 2026-09-10 · [advisory](https://access.redhat.com/errata/RHSA-2026:66401)\n- **RHSA-2026:7884** · Red Hat · fixed in: Red Hat OpenStack Services on OpenShift 18.0 · released 2026-04-29 · [advisory](https://access.redhat.com/errata/RHSA-2026:7884)\n- **Red Hat VEX** · Important · affected: Red Hat OpenStack Platform 13 (Queens), Red Hat OpenStack Platform 16.2, Red Hat OpenStack Platform 17.1, Red Hat OpenStack Platform 18.0 · no fix planned: Red Hat OpenStack Platform 13 (Queens), Red Hat OpenStack Platform 16.2, Red Hat OpenStack Platform 17.1, Red Hat OpenStack Platform 18.0 · updated 2026-09-10 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-24708.json)","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":45.1,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}