Isolation failure via shared PCI pass-through resources
Published Sep 25, 2024 · Updated Sep 25, 2024
Resource isolation failure in Xen Hypervisor allows guest OS users to cross host and guest trust boundaries through shared PCI resources. Xen permits device assignment while BAR pages or INTx lines overlap resources used by other devices, leaving guest access insufficiently isolated. PCI pass-through with resource sharing is required; the exact effect is device-specific, and the vendor cannot rule out privilege escalation, information disclosure, or service interruption.
Summary
What happened
Resource isolation failure in Xen Hypervisor allows guest OS users to cross host and guest trust boundaries through shared PCI resources. Xen permits device assignment while BAR pages or INTx lines overlap resources used by other devices, leaving guest access insufficiently isolated. PCI pass-through with resource sharing is required; the exact effect is device-specific, and the vendor cannot rule out privilege escalation, information disclosure, or service interruption.
The record
- CVE
- CVE-2024-31146
- Published
- Sep 25, 2024
- Updated
- Sep 25, 2024
- Vendor
- Xen Project
- Product
- Xen Hypervisor
- Classifications
- CWE-400, T1068
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- Sep 25, 2024CVE publishedPublication date reported by the CVE source.
- Sep 25, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=0 <=*
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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