PYSEC-2026-2685

Vulnerability from pysec - Published: 2026-07-13 14:36 - Updated: 2026-07-13 16:05
VLAI
Details

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.

Severity
8.2 (High)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:H
Impacted products
Name purl
nova pkg:pypi/nova
Aliases
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "nova",
        "purl": "pkg:pypi/nova"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "30.2.1"
            },
            {
              "introduced": "31.0.0.0rc1"
            },
            {
              "last_affected": "31.2.0"
            },
            {
              "introduced": "32.0.0.0rc1"
            },
            {
              "last_affected": "32.1.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "15.1.5",
        "16.1.6",
        "16.1.7",
        "16.1.8",
        "17.0.10",
        "17.0.11",
        "17.0.12",
        "17.0.13",
        "17.0.7",
        "17.0.8",
        "17.0.9",
        "18.0.2",
        "18.0.3",
        "18.1.0",
        "18.2.0",
        "18.2.1",
        "18.2.2",
        "18.2.3",
        "18.3.0",
        "19.0.0",
        "19.0.0.0rc1",
        "19.0.0.0rc2",
        "19.0.1",
        "19.0.2",
        "19.0.3",
        "19.1.0",
        "19.2.0",
        "19.3.0",
        "19.3.1",
        "19.3.2",
        "20.0.0",
        "20.0.0.0rc1",
        "20.0.0.0rc2",
        "20.0.1",
        "20.1.0",
        "20.1.1",
        "20.2.0",
        "20.3.0",
        "20.4.0",
        "20.4.1",
        "20.5.0",
        "20.6.0",
        "20.6.1",
        "21.0.0",
        "21.0.0.0rc1",
        "21.0.0.0rc2",
        "21.1.0",
        "21.1.1",
        "21.1.2",
        "21.2.0",
        "21.2.1",
        "21.2.2",
        "21.2.3",
        "21.2.4",
        "22.0.0",
        "22.0.0.0rc1",
        "22.0.1",
        "22.1.0",
        "22.2.0",
        "22.2.1",
        "22.2.2",
        "22.3.0",
        "22.4.0",
        "23.0.0",
        "23.0.0.0rc1",
        "23.0.0.0rc2",
        "23.0.1",
        "23.0.2",
        "23.1.0",
        "23.2.0",
        "23.2.1",
        "23.2.2",
        "24.0.0",
        "24.0.0.0rc1",
        "24.0.0.0rc2",
        "24.1.0",
        "24.1.1",
        "24.2.0",
        "24.2.1",
        "25.0.0",
        "25.0.0.0rc1",
        "25.0.1",
        "25.1.0",
        "25.1.1",
        "25.2.0",
        "25.2.1",
        "25.3.0",
        "26.0.0",
        "26.0.0.0rc1",
        "26.0.0.0rc2",
        "26.1.0",
        "26.1.1",
        "26.2.0",
        "26.2.1",
        "26.2.2",
        "26.3.0",
        "27.0.0",
        "27.0.0.0rc1",
        "27.1.0",
        "27.2.0",
        "27.3.0",
        "27.4.0",
        "27.5.0",
        "27.5.1",
        "28.0.0",
        "28.0.0.0rc1",
        "28.0.1",
        "28.1.0",
        "28.2.0",
        "28.3.0",
        "28.3.1",
        "29.0.0",
        "29.0.0.0rc1",
        "29.0.1",
        "29.0.2",
        "29.1.0",
        "29.2.0",
        "29.2.1",
        "29.2.2",
        "29.3.0",
        "29.4.0",
        "30.0.0",
        "30.0.0.0rc1",
        "30.1.0",
        "30.2.0",
        "30.2.1",
        "31.0.0",
        "31.0.0.0rc1",
        "31.0.1",
        "31.1.0",
        "31.2.0",
        "32.0.0",
        "32.0.0.0rc1",
        "32.1.0"
      ]
    }
  ],
  "aliases": [
    "CVE-2026-24708",
    "GHSA-m4f3-qp2w-gwh6"
  ],
  "details": "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\u0027s 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.",
  "id": "PYSEC-2026-2685",
  "modified": "2026-07-13T16:05:05.570731Z",
  "published": "2026-07-13T14:36:36.717368Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-24708"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openstack/nova/commit/3eba22ff09c81a61750fbb4882e5f1f01a20fdf5"
    },
    {
      "type": "WEB",
      "url": "https://bugs.launchpad.net/nova/+bug/2137507"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/openstack/nova"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2026/02/msg00025.html"
    },
    {
      "type": "WEB",
      "url": "https://www.openwall.com/lists/oss-security/2026/02/17/7"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/nova"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-m4f3-qp2w-gwh6"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "OpenStack Nova calls qemu-img without format restrictions for resize "
}



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