Bug 2489379 (CVE-2026-46448)
| Summary: | CVE-2026-46448 openstack-nova: OpenStack Nova: Resource allocation issue due to unstripped hint data in server creation API | ||
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| Product: | [Other] Security Response | Reporter: | OSIDB Bzimport <bzimport> |
| Component: | vulnerability | Assignee: | Product Security DevOps Team <prodsec-dev> |
| Status: | NEW --- | QA Contact: | |
| Severity: | high | Docs Contact: | |
| Priority: | high | ||
| Version: | unspecified | CC: | eglynn, jjoyce, jpretori, jschluet, lhh, mburns, mgarciac |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | --- | |
| Doc Text: |
A flaw was found in OpenStack Nova. The server creation application programming interface (API) fails to remove specific hint data, leading to instances being created without proper Placement allocation. This can result in a denial of service, as resources may not be correctly assigned or managed for the affected instances.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | Type: | --- | |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
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Description
OSIDB Bzimport
2026-06-16 20:01:58 UTC
CVSS re-evaluation: RH score updated from 6.5 (Moderate) to 8.5 (Important) to align with NIST. The original RH vector (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H = 6.5) was auto-populated by AEGIS with no manual analysis. Lucas Celant flagged a 2.0-point discrepancy crossing the Medium/High severity boundary against NIST's score (AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H = 8.5). Two metrics were re-evaluated: - Scope (S:U → S:C): The scheduler hint injection bypasses Placement and scheduling constraints, allowing a tenant to affect co-located tenants' resource availability and potentially escape AZ/host aggregate isolation. This crosses the tenant security boundary, justifying Changed scope. - Integrity (I:N → I:L): The missing Placement allocations cause the resource accounting state in the Placement service to no longer reflect reality. Instances exist on compute nodes but are untracked, corrupting the integrity of the resource management subsystem. Updated vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H = 8.5 (Important). |