{"id":"CVE-2017-17051","aliases":["GHSA-vq76-rxx3-4r4r","PYSEC-2026-692"],"title":"OpenStack Nova DoS by rebuilding the same instance with a new image multiple times","summary":"OpenStack Nova DoS by rebuilding the same instance with a new image multiple times","severity":"high","cvss":8.6,"cvssVector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","vendor":"nova","product":"nova","ecosystem":"pip","affected":["nova < 16.0.4"],"patched":["nova 16.0.4"],"published":"2022-05-13","updated":"2026-07-06","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-vq76-rxx3-4r4r","references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2017-17051"},{"url":"https://github.com/openstack/nova/commit/25a1d78e83065c5bea5d8e0a017fd9d0914d41d9"},{"url":"https://github.com/openstack/nova/commit/fed660c1189fdf4159d97badfdc8c5b35ad14f23"},{"url":"https://github.com/openstack/nova"},{"url":"https://launchpad.net/bugs/1732976"},{"url":"https://review.openstack.org/521662"},{"url":"https://review.openstack.org/523214"},{"url":"https://security.openstack.org/ossa/OSSA-2017-006.html"},{"url":"http://www.securityfocus.com/bid/102102"}],"tags":["osv","pip"],"epss":0.01666,"epssPercentile":0.75334,"ingestedAt":"2026-07-08T18:25:53.359Z","slug":"CVE-2017-17051","body":"## Overview\n\nAn issue was discovered in the default FilterScheduler in OpenStack Nova 16.0.3. By repeatedly rebuilding an instance with new images, an authenticated user may consume untracked resources on a hypervisor host leading to a denial of service, aka doubled resource allocations. This regression was introduced with the fix for OSSA-2017-005 (CVE-2017-16239); however, only Nova stable/pike or later deployments with that fix applied and relying on the default FilterScheduler are affected.\n\n## Affected packages\n\n- `nova < 16.0.4`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `nova 16.0.4`","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":47.3,"likelihood":0.3,"exploitation":0,"ransomware":0},"changes":[]}